A255737 Total number of toothpicks in the toothpick structure of A153000 that are parallel to the initial toothpick, after n odd rounds.

0, 1, 2, 5, 6, 9, 13, 21, 22, 25, 29, 37, 41, 50, 65, 85, 86, 89, 93, 101, 105, 114, 129, 149, 153, 162, 177, 198, 213, 241, 293, 341, 342, 345, 349, 357, 361, 370, 385, 405, 409, 418, 433, 454, 469, 497, 549, 597, 601, 610, 625, 646, 661, 689, 741, 790, 805, 833, 885, 941, 994, 1085, 1253, 1365, 1366, 1369

Offset

0,3

Comments

Total number of toothpicks in the first quadrant of the toothpick structure of A139250 that are parallel to the initial toothpick, after n odd rounds.

Written as an irregular triangle in which the row lengths are the terms of A011782 the right border gives A002450.

Links

Table of n, a(n) for n=0..65.

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Index entries for sequences related to cellular automata

Formula

a(n) = (A162795(n+1) - 1)/4.

Crossrefs

Cf. A002450, A011782, A139250, A151920, A153000, A162795, A255747.

Sequence in context: A103982 A030488 A190678 * A366741 A271371 A193978

Adjacent sequences: A255734 A255735 A255736 * A255738 A255739 A255740

Keyword

nonn

Author

Omar E. Pol, Mar 07 2015

Status

approved