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A160723 First differences of A160722. 2
1, 4, 4, 10, 4, 10, 10, 22, 4, 10, 10, 22, 10, 22, 22, 46, 4, 10, 10, 22, 10, 22, 22, 46, 10, 22, 22, 46, 22, 46, 46, 94, 4, 10, 10, 22, 10, 22, 22, 46, 10, 22, 22, 46, 22, 46, 46, 94, 10, 22, 22, 46, 22, 46, 46, 94, 22, 46, 46, 94, 46, 94, 94, 190 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..64.

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

FORMULA

a(n) = 3*A001316(n-1) - 2

CROSSREFS

Cf. A139250, A139251, A160720, A160721, A160722.

Sequence in context: A205549 A120395 A321078 * A255486 A286779 A007426

Adjacent sequences:  A160720 A160721 A160722 * A160724 A160725 A160726

KEYWORD

nonn

AUTHOR

Omar E. Pol, May 25 2009

EXTENSIONS

Formula and more terms from Max Alekseyev, Sep 08 2011

STATUS

approved

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Last modified January 19 07:43 EST 2019. Contains 319305 sequences. (Running on oeis4.)