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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 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

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