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A170845
G.f.: Product_{k>=1} (1 + 3x^(2^k-1) + x^(2^k)).
0
1, 3, 1, 3, 10, 6, 1, 3, 10, 6, 10, 33, 28, 9, 1, 3, 10, 6, 10, 33, 28, 9, 10, 33, 28, 36, 109, 117, 55, 12, 1, 3, 10, 6, 10, 33, 28, 9, 10, 33, 28, 36, 109, 117, 55, 12, 10, 33, 28, 36, 109, 117, 55, 39, 109, 117, 136, 363, 460, 282, 91, 15, 1, 3, 10, 6, 10, 33, 28, 9, 10, 33, 28, 36, 109
OFFSET
0,2
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: A257253 A067329 A170860 * A375720 A025238 A289066
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 02 2010
STATUS
approved