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A153004 First differences of toothpick numbers A153003. 7
1, 3, 3, 3, 6, 9, 6, 3, 6, 9, 9, 12, 21, 24, 12, 3, 6, 9, 9, 12, 21, 24, 15, 12, 21, 27, 30, 45, 66, 60, 24, 3, 6, 9, 9, 12, 21, 24, 15, 12, 21, 27, 30, 45, 66, 60, 27, 12, 21, 27, 30, 45, 66, 63, 42, 45, 69, 84, 105, 156, 192, 144, 48, 3 (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

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

EXAMPLE

Triangle begins:

1;

3,3;

3,6,9,6;

3,6,9,9,12,21,24,12;

3,6,9,9,12,21,24,15,12,21,27,30,45,66,60,24;

CROSSREFS

Cf. A139251, A152968, A152978, A152998, A153000, A153003.

Toothpick sequence: A139250.

Sequence in context: A058675 A025497 A031502 * A214361 A124449 A262877

Adjacent sequences:  A153001 A153002 A153003 * A153005 A153006 A153007

KEYWORD

nonn

AUTHOR

Omar E. Pol, Jan 02 2009

STATUS

approved

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Last modified February 23 23:56 EST 2018. Contains 299595 sequences. (Running on oeis4.)