login
A221565
Number of toothpicks or D-toothpicks added at n-th stage to the structure of A220512.
2
0, 4, 8, 16, 16, 16, 28, 48, 32, 16, 32, 64, 64, 80, 84, 112, 64, 16, 32, 64, 96, 112, 144, 176, 136, 112, 96, 176, 176, 208, 196, 240, 128, 16, 32, 64, 96, 112, 152
OFFSET
0,2
COMMENTS
The first differences of A220512.
First differs from A194433 at a(14).
EXAMPLE
When written as a irregular triangle begins:
0;
4;
8;
16,16;
16,28,48,32;
16,32,64,64,80,84,112,64;
16,32,64,96,112,144,176,136,112,96,176,176,208,196,240,128;
16,32,64,96,112,152...
CROSSREFS
Row lengths give 1 together with A011782. Right border gives 0 together with four times A000079.
Sequence in context: A099212 A045534 A194433 * A194435 A221528 A312759
KEYWORD
nonn,tabf,more
AUTHOR
Omar E. Pol, May 13 2013
STATUS
approved