A160716 a(n) = A160714(n)*2.

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

Table of n, a(n) for n=0..17.

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.]

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Crossrefs

Cf. A139250, A160172, A160173, A160714, A160724, A160726.

Sequence in context: A288225 A047463 A107059 * A071642 A226827 A266538

Adjacent sequences: A160713 A160714 A160715 * A160717 A160718 A160719

Keyword

more,nonn

Author

Omar E. Pol, Jun 02 2009

Status

approved