A151888 Net increase in number of ON toothpicks at generation n in A151885.

0, 1, 2, 2, 6, -6, 10, 2, 22, -34, 10, 10, 30, -38, 34, 10, 78, -134, 10, 10, 30, -30, 50, 10, 110, -178, 34, 34, 102, -126, 122, 34, 278, -490, 10, 10, 30, -30, 50, 10, 110, -170, 50, 50, 150, -190, 170, 50, 390, -678, 34, 34

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

Formula

a(n) = A151886(n)+A151887(n).

Crossrefs

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

Sequence in context: A055993 A309912 A222734 * A320046 A289835 A168276

Adjacent sequences: A151885 A151886 A151887 * A151889 A151890 A151891

Keyword

sign

Author

N. J. A. Sloane, Jul 23 2009

Extensions

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

Status

approved