A188345 Number of diamonds present in the n-th generation of the Q-toothpick sequence A187210.

0, 0, 0, 0, 0, 3, 5, 5, 11, 21, 29, 29, 35, 43, 49, 53, 75, 105, 121, 121, 127, 135, 141, 145, 167, 195, 209, 213, 231, 251, 265, 293, 367, 445, 477, 477, 483, 491, 497, 501, 523, 551, 565, 569, 587, 607, 621, 649, 723, 799

Offset

0,6

Comments

See A187210 for a description of the different shapes that appear in the Q-toothpick sequence.

Links

Nathaniel Johnston, Table of n, a(n) for n = 0..181

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.]

Nathaniel Johnston, The Q-Toothpick Cellular Automaton

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Crossrefs

Cf. A187210, A188344, A188346.

Sequence in context: A266505 A118132 A089167 * A349204 A028265 A084041

Adjacent sequences: A188342 A188343 A188344 * A188346 A188347 A188348

Keyword

nonn

Author

Nathaniel Johnston, Mar 28 2011

Status

approved