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A221528 Number of toothpicks or D-toothpicks added at n-th stage to the structure of A220514. 4
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Essentially the first differences of A220514.
First differs from A194435 at a(13).
LINKS
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.
Sequence in context: A194433 A221565 A194435 * A312759 A312760 A312761
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Mar 23 2013
STATUS
approved

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Last modified May 22 06:48 EDT 2024. Contains 372743 sequences. (Running on oeis4.)