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A160726 a(n) = A160714(n)*4. 2
0, 4, 8, 20, 24, 36, 48, 84, 88 (list; graph; refs; listen; history; text; internal format)
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..8.

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, A160716, A160724.

Sequence in context: A006580 A061814 A087254 * A191483 A062717 A084922

Adjacent sequences:  A160723 A160724 A160725 * A160727 A160728 A160729

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Jun 02 2009

STATUS

approved

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Last modified January 23 06:15 EST 2019. Contains 319374 sequences. (Running on oeis4.)