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A160408 Toothpick pyramid (see Comments lines for definition). 7
0, 1, 2, 4, 8, 12, 16, 20, 24, 32, 48, 64, 72, 76, 80, 88 (list; graph; refs; listen; history; text; internal format)



The toothpick pyramid is a three-dimensional version of the toothpick triangle A160406.

The sequence gives the number of toothpicks after n rounds. A160409 (the first differences) gives the number added at the n-th round.

See also the entry A139250 for more information about the toothpick sequences.


Table of n, a(n) for n=0..15.

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


Cf. A139250, A139251, A160160, A160406, A160407, A160409.

Sequence in context: A048166 A010066 A180490 * A221707 A186146 A006638

Adjacent sequences:  A160405 A160406 A160407 * A160409 A160410 A160411




Omar E. Pol, May 23 2009, Jun 06 2009



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Last modified November 19 16:10 EST 2017. Contains 294936 sequences.