November 17, 2009
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.