A182131 Largest group of fireflies on a 15 X 15 board for which no pair ever converges.

0, 4, 6, 8, 11, 13, 17, 21, 24, 27, 31, 37, 41, 46, 51

Offset

1,2

Comments

I have only seen the answer, not the question, so the details of the problem are not clear to me.

Links

Table of n, a(n) for n=1..15.

Ian Stewart, The Synchronicity of Firefly Flashing, Scientific American, Vol. 280, No. 3, March 1999, pp. 104-106.

Ian Stewart, Mathematical Recreations Column, Scientific American, Vol. 282, No. 4, April 2000, p. 113. (Reader Feedback, reporting on results obtained by Cindy Eisner of Zichron Yaacov, Israel, answering a question raised in the March 1999 column on "The Synchronicity of Firefly Flashing").

Crossrefs

Sequence in context: A086377 A003662 A132635 * A298868 A134779 A226250

Adjacent sequences: A182128 A182129 A182130 * A182132 A182133 A182134

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Apr 14 2012

Status

approved