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A160159
First differences of A160158.
1
2, 2, 4, 8, 8, 4, 8, 12, 8, 8, 16, 24, 20, 12, 20, 20, 8, 8, 16, 24, 20, 16, 28, 32, 24, 32, 56, 68, 52, 40, 52, 36, 8, 8, 16, 24, 20, 16, 28, 32, 24, 32, 56, 68, 52, 44, 60, 48, 24, 32, 56, 68, 56, 60, 88, 88, 80, 120, 180, 188, 144, 128, 132, 68, 8, 8, 16, 24, 20, 16, 28, 32, 24
OFFSET
1,1
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
KEYWORD
nonn
AUTHOR
Omar E. Pol, May 29 2009
EXTENSIONS
Extended beyond a(13) by R. J. Mathar, Jun 01 2009
STATUS
approved