A006720 Somos-4 sequence: $a(0)=a(1)=a(2)=a(3)=1$; for $n \geq 4$, $a(n)=(a(n-1)a(n-3)+a(n-2)^2)/a(n-4)$. 1, 1, 1, 1, 2, 3, 7, 23, 59, 314, 1529, 8209, 83313, 620297, 7869898, 126742987, 1687054711, 47301104551, 1123424582771, 32606721084786, 1662315215971057, 61958046554226593, 4257998884448335457, 334806306946199122193, …
Amusing to hear John Humphrys incredulous at something I felt was well-known & obvious: The Simpsons has maths jokes http://t.co/jSJO7Or0yp — Peter Rowlett (@peterrowlett) October 2, 2013
Here’s a roundup of some news stories that slipped past our highly trained news snipers.
This is the second and final part of our interview with Colm Mulcahy. Last week we talked about card magic; in this part we moved on to the subject of Martin Gardner and the gatherings of interesting people associated with his name. We’ve tacked on some blather we recorded about the British Science Festival in…
Radio 4 maths police More or Less took time off from calling out journalists and deputy prime ministers for their misuse of statistics this series to sneak a hidden maths puzzle into their show. The first five episodes were “brought to us by” the numbers, respectively, 1, 49, 100, 784 and 1444. Listeners were invited…
Puzzlebomb is a monthly puzzle compendium. Issue 22 of Puzzlebomb, for October 2013, can be found here: Puzzlebomb – Issue 22 – October 2013 The solutions to Issue 22 can be found here: Puzzlebomb – Issue 22 – October 2013 – Solutions Previous issues of Puzzlebomb, and their solutions, can be found here.
More or Less, the BBC’s maths and statistics radio show, has been sneakily doing a puzzle on us for the last few weeks. The episodes in the series so far have each been ‘brought to you’, Sesame Street-style, by a different number. But what will the final episode be? Can you crack the integer code…