A170866 a(0) = 1, a(1) = 1; a(2^i + j) = 2a(j) + 3a(j + 1) for 0 <= j < 2^i.

1, 1, 5, 17, 5, 17, 61, 49, 5, 17, 61, 49, 61, 217, 269, 113, 5, 17, 61, 49, 61, 217, 269, 113, 61, 217, 269, 281, 773, 1241, 877, 241, 5, 17, 61, 49, 61, 217, 269, 113, 61, 217, 269, 281, 773, 1241, 877, 241, 61, 217, 269, 281, 773, 1241, 877, 409, 773, 1241, 1381, 2881, 5269

Offset

0,3

Links

Table of n, a(n) for n=0..60.

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

Crossrefs

Sequence in context: A090592 A340706 A093558 * A337031 A125636 A355658

Adjacent sequences: A170863 A170864 A170865 * A170867 A170868 A170869

Keyword

nonn

Author

N. J. A. Sloane, Jan 02 2010

Status

approved