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A170839
G.f.: Product_{k>=1} (1 + x^(2^k-1) + 3x^(2^k)).
0
1, 1, 3, 1, 4, 6, 9, 1, 4, 6, 10, 7, 18, 27, 27, 1, 4, 6, 10, 7, 18, 27, 28, 7, 18, 28, 37, 39, 81, 108, 81, 1, 4, 6, 10, 7, 18, 27, 28, 7, 18, 28, 37, 39, 81, 108, 82, 7, 18, 28, 37, 39, 81, 109, 91, 39, 82, 121, 150, 198, 351, 405, 243, 1, 4, 6, 10, 7, 18, 27, 28, 7, 18, 28, 37, 39, 81
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.]
CROSSREFS
Sequence in context: A072267 A024934 A186358 * A049918 A357182 A028861
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 02 2010
STATUS
approved