0,3

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 nth round.

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

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

Sequence in context: A019442 A048166 A010066 this_sequence A006638 A001212 A160736

Adjacent sequences: A160405 A160406 A160407 this_sequence A160409 A160410 A160411

more,nonn

Omar E. Pol (info(AT)polprimos.com), May 23 2009, Jun 06 2009