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A159785
a(n) = A152980(n)*3.
1
3, 6, 9, 9, 12, 21, 24, 15, 12, 21, 27, 30, 45, 66, 60, 27, 12, 21, 27, 30, 45, 66, 63, 42, 45, 69, 84, 105, 156, 192, 144, 51, 12, 21, 27, 30, 45, 66, 63, 42, 45, 69, 84, 105, 156, 192, 147, 66, 45, 69, 84, 105, 156, 195, 168, 129, 159, 222, 273, 366, 504, 528
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
Toothpick sequence: A139250.
Sequence in context: A329213 A007844 A224523 * A057338 A337603 A077856
KEYWORD
nonn
AUTHOR
Omar E. Pol, May 02 2009
EXTENSIONS
More terms from 3*A152980(n) by Jinyuan Wang, Mar 14 2020
STATUS
approved