1,2

Number of toothpicks added to the spiral at the n-th stage.

Table of n, a(n) for n=1..73.

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. A000045, A139250, A139251, A160426, A160427, A160800.

Sequence in context: A220886 A256156 A087266 * A177002 A079046 A079045

Adjacent sequences: A160798 A160799 A160800 * A160802 A160803 A160804

nonn

Omar E. Pol, May 26 2009

Terms after a(32) from Nathaniel Johnston, Mar 30 2011

approved