A172307 a(n) = A172305(n)/2.

0, 1, 2, 4, 4, 4, 8, 8, 4, 8, 12, 12, 16, 12, 24, 20, 12, 8, 12, 20, 24, 20, 28, 28, 32, 32, 36, 28, 32, 24, 40, 44, 16, 16, 32, 36, 32, 20, 32, 40, 48, 52, 72, 48, 64, 60, 80, 56, 48, 40, 64, 64, 72, 44, 68, 64, 68, 72, 84, 84, 108, 80, 96, 84, 32, 40, 64

Offset

0,3

Links

Robert Price, Table of n, a(n) for n = 0..202

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, A172304, A172305, A172306, A172308, A172309, A172310, A172311, A172312, A172313.

Sequence in context: A023820 A225355 A117726 * A108039 A367013 A103228

Adjacent sequences: A172304 A172305 A172306 * A172308 A172309 A172310

Keyword

more,nonn

Author

Omar E. Pol, Feb 06 2010

Extensions

a(14)-a(66) from Robert Price, Jun 17 2019

Status

approved