0,2

Table of n, a(n) for n=0..74.

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.]

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

Cf. A105321, A139250, A139251, A173522.

Sequence in context: A242050 A037869 A037868 * A059963 A137934 A133738

Adjacent sequences: A173066 A173067 A173068 * A173070 A173071 A173072

sign

Omar E. Pol, May 29 2010

More terms from Nathaniel Johnston, Nov 15 2010

approved