A221528 Number of toothpicks or D-toothpicks added at n-th stage to the structure of A220514.

0, 4, 8, 16, 16, 16, 32, 44, 32, 16, 32, 64, 96, 64, 80, 100, 64, 16, 32, 64, 96, 128, 144, 168, 176, 80, 96, 176, 256, 160, 176, 212, 128, 16, 32, 64, 96, 128, 144, 176, 208, 168, 192, 256, 400, 320, 336, 364, 336, 112, 96, 192, 288, 368, 416, 496

Offset

0,2

Comments

Essentially the first differences of A220514.

First differs from A194435 at a(13).

Links

Table of n, a(n) for n=0..55.

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

Index entries for sequences related to toothpick sequences

Formula

a(n) = 4*A220525(n).

Example

When written as an irregular triangle begins:
0;
4;
8;
16,16;
16,32,44,32;
16,32,64,96,64,80,100,64;
16,32,64,96,128,144,168,176,80,96,176,256,160,176,212,128;
16,32,64,96,128,144,176,208,168,192,256,400,320,336,364,336,112,96,192,288,368,416,496,528,216,224,400,576,352,368, 436,256;

Crossrefs

Row lengths give 1 together with A011782.

Cf. A139251, A194435, A194701, A220501, A220521, A220523, A220525.

Sequence in context: A194433 A221565 A194435 * A312759 A312760 A312761

Adjacent sequences: A221525 A221526 A221527 * A221529 A221530 A221531

Keyword

nonn,tabf

Author

Omar E. Pol, Mar 23 2013

Status

approved