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A160716
a(n) = A160714(n)*2.
1
0, 2, 4, 10, 12, 18, 24, 42, 44, 50, 56, 74, 80, 98, 116, 170, 224, 226
OFFSET
0,2
COMMENTS
The sequence gives the number of T-toothpicks in the structure after n rounds.
See A160172 and A160714 for more information about T-toothpick sequences.
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
more,nonn
AUTHOR
Omar E. Pol, Jun 02 2009
STATUS
approved