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A151777
First differences of A151776.
2
1, 12, 12, 84, 12, 84, 180, 420, 12, 84, 180, 564, 540, 420, 1116, 2028, 108, 84, 180, 564, 540, 564, 1500, 3276, 1836, 420, 1116, 2940, 4380, 2724, 6252, 10212, 1284, 372, 420, 612, 540, 564, 1500, 3276
OFFSET
1,2
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.]
CROSSREFS
Sequence in context: A161196 A328531 A111306 * A143478 A219400 A219448
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 24 2009
EXTENSIONS
Terms after a(30) from Nathaniel Johnston, Mar 27 2011
STATUS
approved