A220495 Number of toothpicks or D-toothpicks added at n-th stage to the structure of A220494.

0, 1, 2, 4, 4, 4, 4, 8, 8, 4, 4, 8, 8, 8, 8, 16, 16, 4, 4, 8, 8, 8, 8, 16, 16, 8, 8, 16, 16, 16, 16, 32, 32, 4, 4, 8, 8, 8, 8, 16, 16, 8, 8, 16, 16, 16, 16, 32, 32, 8, 8, 16, 16, 16, 16, 32, 32, 16, 16, 32, 32, 32, 32, 64, 64, 4, 4, 8, 8, 8, 8, 16, 16

Offset

0,3

Comments

Essentially the first differences of A220494.

First differs from A194441 (and from A220521) 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

When written as an irregular triangle begins:
0;
1;
2;
4,4;
4,4,8,8;
4,4,8,8,8,8,16,16;
4,4,8,8,8,8,16,16,8,8,16,16,16,16,32,32;
4,4,8,8,8,8,16,16,8,8,16,16,16,16,32,32,8,8,16,16,...

Crossrefs

Cf. A139250, A139251, A194271, A194701, A194441, A220494, A220497, A220521.

Sequence in context: A220527 A183226 A235863 * A194441 A220521 A236680

Adjacent sequences: A220492 A220493 A220494 * A220496 A220497 A220498

Keyword

nonn,tabf

Author

Omar E. Pol, Dec 23 2012

Status

approved