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

Author

Omar E. Pol, May 02 2009

Keywords

• nonn

Links

• 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

Toothpick sequence: A139250.

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

Programs

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

Extensions

More terms from Jinyuan Wang, Mar 04 2020