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November 17, 2009


srikanth @ 9:30 pm, GMT +0000 ( 1258493434 ) Play

What sequence connects:

PS: D5PQ has been moderated and points assigned. If any of you saw a jump in your points, this is why.

Cracked by everyone. Yes, the middle guy isn’t a direct connect, but it was a simpler connection :-)


Clifford Stall (left)  in his book “The Cuckoo’s Egg” mentions a puzzle created by Robert Tapan Morris Senior (the dad of the guy in the middle).

The puzzle asked the reader to identify the next number in the sequence: 1, 11, 21, 1211, 111221,…  The puzzle was suggested by Morris Sr. inspired by John Conway (right)

The connecting sequence is the so-called Look and Say sequence.

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