A173463 a(n) = A173461(n+1)/4.

2, 3, 2, 13, 3, 3, 21, 9, 7, 47, 3, 3, 21, 9, 9, 63, 9, 9, 63, 27, 23, 157, 3, 3, 21, 9, 9, 63, 9, 9, 63, 27, 27, 189, 9, 9, 63, 27, 27, 189, 27, 27, 189, 81, 73, 503, 3, 3, 21, 9, 9, 63, 9, 9, 63, 27, 27

Offset

1,1

Links

Table of n, a(n) for n=1..57.

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. A173459, A173460, A173461, A173462.

Sequence in context: A012960 A013117 A120864 * A023641 A083775 A083784

Adjacent sequences: A173460 A173461 A173462 * A173464 A173465 A173466

Keyword

nonn,more

Author

Omar E. Pol, Feb 18 2010

Extensions

More terms from Jinyuan Wang, Mar 02 2020

Status

approved