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A160714
T-toothpick sequence starting at the corner of an infinite square, but with angle = Pi/4.
3
0, 1, 2, 5, 6, 9, 12, 21, 22, 25, 28, 37, 40, 49, 58, 85, 112, 113
OFFSET
0,3
COMMENTS
The sequence gives the number of T-toothpicks after n rounds.
See A160172 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