Recreational Maths Seminar – Seven Staggering Sequences
Yesterday I hosted another recreational maths seminar on Google+. I had a lot of fun! We discussed the paper, Seven Staggering Sequences (PDF), by Neil Sloane. In the paper Sloane, the man behind the...
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Integer sequence review: A225143
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...
View ArticleInteger sequence review: A010727
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...
View ArticleInteger sequence puzzle in More or Less
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...
View ArticleMore Or Less integer sequence solution revealed (spoilers!)
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...
View ArticleOEIS Foundation Appeal
If you’ve worked with or used any sequences of integers lately (and let’s face it, you have) you might have looked them up in the OEIS. I’ve used it twice today, and it’s still before 9.30am. As you...
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Discovering integer sequences by dealing cards
Let’s play a game: Imagine you have some playing cards. Of course if you actually have some cards you don’t need to imagine! Pick your favourite natural number $n$ and put a deck of $n$ cards in front...
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GCHQ Christmas puzzles winners and solutions announced
The first puzzle is a super-fun 25×25 nonogram puzzle Before Christmas, the benign megasurveillance bods at GCHQ released a set of festive puzzles, in the form of a Christmas card and associated...
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Puzzlebomb – May 2016
Puzzlebomb is a monthly puzzle compendium. Issue 53 of Puzzlebomb, for May 2016, can be found here: Puzzlebomb – Issue 53 – May 2016 The solutions to Issue 53 can be found here: Puzzlebomb – Issue 53...
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Solomon Golomb (1932-2016)
“I’m proud that I’ve lived to see… so many of the things that I’ve worked on being so widely adopted that no one even thinks about where they came from.” Solomon Golomb (1932-2016) Solomon Golomb, who...
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The OEIS now contains 300,000 integer sequences
The Online Encyclopedia of Integer Sequences just keeps on growing: at the end of last month it added its 300,000th entry. Especially round entry numbers are set aside for particularly nice sequences...
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