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A151888
Net increase in number of ON toothpicks at generation n in A151885.
4
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
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.]
FORMULA
a(n) = A151886(n)+A151887(n).
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jul 23 2009
EXTENSIONS
Terms after a(8) from Nathaniel Johnston, Apr 02 2011
STATUS
approved