A160745 - OEIS

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A160745

First differences of A160744.

0

3, 3, 6, 6, 6, 6, 12, 12, 6, 6, 12, 12, 12, 12, 24, 24, 6, 6, 12, 12, 12, 12, 24, 24, 12, 12, 24, 24, 24, 24, 48, 48, 6, 6, 12, 12, 12, 12, 24, 24, 12, 12, 24, 24, 24, 24, 48, 48, 12, 12, 24, 24, 24, 24, 48, 48, 24, 24, 48, 48, 48, 48, 96, 96, 6, 6, 12, 12, 12, 12, 24, 24, 12, 12, 24

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..75.

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*A060632(n). [From R. J. Mathar, Feb 03 2010]

CROSSREFS

Cf. A139251, A151566, A160743, A160744.

Sequence in context: A370291 A072464 A262871 * A105676 A127739 A327142

Adjacent sequences: A160742 A160743 A160744 * A160746 A160747 A160748

KEYWORD

nonn

AUTHOR

Omar E. Pol, May 25 2009

EXTENSIONS

Terms beyond a(7) from R. J. Mathar, Feb 03 2010

STATUS

approved