0,7

Table of n, a(n) for n=0..66.

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

OEIS Plot 2, Triangular numbers and toothpick numbers vs n

Sequence in context: A021787 A011052 A153738 * A251809 A016639 A138341

Adjacent sequences: A159787 A159788 A159789 * A159791 A159792 A159793

sign

Omar E. Pol, May 03 2009

More terms from R. J. Mathar, May 04 2009

approved