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A170878
First differences of A072272.
2
4, 0, 12, -12, 20, -8, 44, -56, 20, 0, 60, -68, 68, -24, 156, -212, 20, 0, 60, -60, 100, -40, 220, -288, 68, 0, 204, -228, 244, -88, 556, -768, 20, 0, 60, -60, 100, -40, 220, -280, 100, 0, 300, -340, 340, -120, 780, -1068, 68, 0, 204, -204, 340, -136, 748, -976, 244, 0, 732, -820, 868, -312, 1980, -2748
OFFSET
0,1
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: A273505 A273706 A273682 * A056460 A137523 A375988
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jan 07 2010, Apr 17 2010
STATUS
approved