A159793 a(n) = A153006(n)*2.

0, 2, 6, 12, 18, 26, 40, 56, 66, 74, 88, 106, 126, 156, 200, 240, 258, 266, 280, 298, 318, 348, 392, 434, 462, 492, 538, 594, 664, 768, 896, 992, 1026, 1034, 1048, 1066, 1086, 1116, 1160, 1202, 1230, 1260, 1306, 1362, 1432, 1536, 1664, 1762, 1806, 1836, 1882, 1938

Offset

0,2

Links

Table of n, a(n) for n=0..51.

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

Prog

(PARI) lista(nn) = concat(0, 2*Vec(x*((1+x)/(1-x))*prod(k=1, nn, 1+x^(2^k-1)+2*x^(2^k)) + O(x^nn))); \\ Jinyuan Wang, Mar 04 2020

Crossrefs

Toothpick sequence: A139250.

Cf. A139251, A152980, A153006, A159794, A159795.

Sequence in context: A294062 A193764 A278484 * A238739 A006511 A325708

Adjacent sequences: A159790 A159791 A159792 * A159794 A159795 A159796

Keyword

nonn

Author

Omar E. Pol, May 02 2009

Extensions

More terms from Jinyuan Wang, Mar 04 2020

Status

approved