A160736 Toothpick sequence starting from a right angle formed by 2 toothpicks: a(n)=A160406(n)*2.

0, 2, 4, 8, 12, 16, 20, 28, 36, 40, 44, 52, 60, 68, 80, 100, 116, 120, 124, 132, 140, 148, 160, 180, 196, 204, 216, 236, 256, 280, 320, 372, 404, 408, 412, 420, 428, 436, 448, 468, 484, 492, 504, 524, 544, 568

Offset

0,2

Links

Table of n, a(n) for n=0..45.

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

Cf. A139250, A139251, A160737, A160738, A160740.

Sequence in context: A001212 A364769 A160742 * A118030 A187208 A349725

Adjacent sequences: A160733 A160734 A160735 * A160737 A160738 A160739

Keyword

nonn

Author

Omar E. Pol, May 25 2009

Extensions

Terms after a(9) from Nathaniel Johnston, Mar 31 2011

Status

approved