0,2

See A170885 for the first differences.

Table of n, a(n) for n=0..39.

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, A170885.

Sequence in context: A303220 A301894 A213215 * A182836 A097080 A274008

Adjacent sequences: A170881 A170882 A170883 * A170885 A170886 A170887

nonn

David Applegate, Omar E. Pol and N. J. A. Sloane, Jan 09 2010

a(7)-a(39) from Nathaniel Johnston, Nov 13 2010

approved