A162794 Number of toothpicks added to the toothpick structure A139250 at the n-th even round.

0, 2, 4, 8, 8, 8, 12, 28, 16, 8, 12, 28, 20, 28, 40, 88, 32, 8, 12, 28, 20, 28, 40, 88, 36, 28, 40, 88, 56, 92, 140, 256, 64, 8, 12, 28, 20, 28, 40, 88, 36, 28, 40, 88, 56, 92, 140, 256, 68, 28, 40, 88, 56, 92, 140, 256, 88, 92, 140, 260, 172, 296, 488, 704, 128, 8, 12, 28, 20, 28

Offset: 0

Author

Omar E. Pol, Jul 14 2009

Keywords

• nonn

Comments

Note that these toothpicks are orthogonal to the initial toothpick in the sieve.

A bisection of A139251.

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

Cf. A139250, A139251, A159791, A159792, A162793, A162795, A162796, A162797.

Extensions

Extended by R. J. Mathar, Sep 27 2009