A151886 Number of toothpicks turned ON at generation n in A151885.

0, 1, 2, 4, 6, 4, 10, 12, 22, 4, 10, 20, 30, 12, 34, 44, 78, 4, 10, 20, 30, 20, 50, 60, 110, 12, 34, 68, 102, 44, 122, 156, 278, 4, 10, 20, 30, 20, 50, 60, 110, 20, 50, 100, 150, 60, 170, 220, 390, 12, 34, 68, 102, 68, 170

Offset

0,3

Links

Nathaniel Johnston, Table of n, a(n) for n = 0..926

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.]

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

N. J. A. Sloane, Illustration of first 8 generations

Crossrefs

Cf. A151885-A151888, A139250, A139251, A147562, A079314.

Sequence in context: A074320 A014428 A180935 * A334016 A371241 A278259

Adjacent sequences: A151883 A151884 A151885 * A151887 A151888 A151889

Keyword

nonn

Author

N. J. A. Sloane, Jul 23 2009

Extensions

Terms after a(8) from Nathaniel Johnston, Apr 02 2011

Status

approved