Here’s some quick stories from the world of maths this week.

# Petition absorbs way more signatures than this product with a stupid advert ever could

An Australian sanitary pad company has hit upon a witty tagline for their product:

Literally thousands of people have signed a petition to tell Libra that that’s not OK.

# ‘The Imitation Game’ Cryptography Competition

To celebrate the release of the upcoming Alan Turing biopic *The Imitation Game* (see our incisive analysis of the film’s trailer by James Grime) the guys at the University of Manchester – who have previously run the hugely successful Alan Turing Cryptography competition – have been asked to run a one-off Imitation Game Cryptography Competition. And they have.

The competition is themed around the (possibly true? Who knows. It’s not like it’s my job to research these things) idea that Alan Turing’s fortune in silver is buried in a secret location somewhere near Bletchley Park, and it’s your job to crack the three coded clues and find out where. Prizes will be in the form of exclusive *Imitation Game* merchandise donated by the makers of the film, and the competition runs until the 28^{th} of November.

#### More information

# Carnival of Mathematics 115

The next issue of the Carnival of Mathematics, rounding up blog posts from the month of September, and compiled by William Wu, is now online at MathTuition88.

The Carnival rounds up maths blog posts from all over the internet, including some from our own Aperiodical. See our Carnival of Mathematics page for more information.

# Integer Sequence Review – Sloane’s birthday edition!

*The Online Encyclopedia of Integer Sequences contains over 200,000 sequences. It contains classics, curios, thousands of derivatives entered purely for completeness’s sake, short sequences whose completion would be a huge mathematical achievement, and some entries which are just downright silly.*

*For a lark, David and I have decided to review some of the Encyclopedia’s sequences. We’re rating sequences on four axes: Novelty, Aesthetics, Explicability and Completeness.*

**CP: **It’s Neil Sloane’s 75th birthday today! As a special birthday gift to him, we’re going to review some integer sequences.

**DC: **His birthday is 10/10, that’s pretty cool.

**CP: ***<some quick oeis> *there’s a sequence with his birthdate in it! A214742 contains 10,10,39.

**DC: **We can’t review that. It’s terrible.

**CP:** I put it to you that you have just reviewed it.

**DC: **Shut up.

**CP:** Anyway, I’ve got some birthday sequences to look at.

**DC: **About cake?

**CP: **No.

A050255

Diaconis-Mosteller approximation to the Birthday problem function.1, 23, 88, 187, 313, 459, 622, 797, 983, 1179, 1382, 1592, 1809, 2031, 2257, 2489, 2724, 2963, 3205, 3450, 3698, 3949, 4203, 4459, 4717, 4977, 5239, 5503, 5768, 6036, 6305, 6575, 6847, 7121, 7395, 7671, 7948, 8227, 8506, 8787, 9068, 9351

# Puzzlebomb – October 2014

Puzzlebomb is a monthly puzzle compendium. Issue 34 of Puzzlebomb, for October 2014, can be found here:

Puzzlebomb – Issue 34 – October 2014

The solutions to Issue 34 will be posted at the same time as Issue 35.

Previous issues of Puzzlebomb, and their solutions, can be found here.

# Maths at the Manchester Science Festival

Manchester Science Festival takes over the city from 23rd October – 2nd November this year, and it’s got a great selection of mathematical events. If you’re based locally, or thinking of heading over there for any of the time, here’s The Aperiodical’s guide to where to get your factorial fix.