0,8

Table of n, a(n) for n=0..101.

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

a(n) = a(1) = 0; for k >= 1, a(2^k) = 2^(k-1)-1, a(2^k+i) = 2*a(i) for 1 <= i < 2^k.

Cf. A160125, A175098, A175099.

Sequence in context: A319753 A078332 A097109 * A175099 A151867 A262563

Adjacent sequences: A160015 A160016 A160017 * A160019 A160020 A160021

nonn

N. J. A. Sloane, Feb 07 2010

approved