A220497 Number of toothpicks or D-toothpicks added at n-th stage to the structure of A220496.

0, 1, 2, 4, 4, 4, 4, 7, 8, 4, 4, 8, 8, 8, 8, 13, 16, 4, 4, 8, 8, 8, 8, 14, 16, 8, 8, 16, 16, 16, 16, 25, 32, 4, 4, 8, 8, 8, 8, 14, 16, 8, 8, 16, 16, 16, 16, 26, 32, 8, 8, 16, 16, 16, 16, 28, 32, 16, 16, 32, 32, 32, 32, 49, 64, 4, 4, 8, 8, 8, 8, 14, 16

Offset

0,3

Comments

Essentially the first differences of A220496.

First differs from A194443 (and from A220523) at a(12).

Links

Table of n, a(n) for n=0..72.

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

Index entries for sequences related to toothpick sequences

Example

Written as an irregular triangle begins:
0;
1;
2;
4,4;
4,4,7,8;
4,4,8,8,8,8,13,16;
4,4,8,8,8,8,14,16,8,8,16,16,16,16,25,32;
4,4,8,8,8,8,14,16,8,8,16,16,16,16,26,32,8,8,16,16,16,16,28,32,16,16,32,32,32,32,49,64;

Crossrefs

Cf. A139250, A139251, A194271, A194443, A194700, A194701, A220495, A220496, A220523.

Sequence in context: A035645 A063440 A008497 * A194443 A220523 A220527

Adjacent sequences: A220494 A220495 A220496 * A220498 A220499 A220500

Keyword

nonn,tabf

Author

Omar E. Pol, Dec 23 2012

Status

approved