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 A220525 Number of toothpicks or D-toothpicks added at n-th stage stage to the structure of A220524. 4
 0, 1, 2, 4, 4, 4, 8, 11, 8, 4, 8, 16, 24, 16, 20, 25, 16, 4, 8, 16, 24, 32, 36, 42, 44, 20, 24, 44, 64, 40, 44, 53, 32, 4, 8, 16, 24, 32, 36, 44, 52, 42, 48, 64, 100, 80, 84, 91, 84, 28, 24, 48, 72, 92, 104, 124, 132, 54, 56, 100, 144, 88, 92, 109, 64, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Essentially the first differences of A220524. First differs from A194445 at a(13). LINKS N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS FORMULA a(n) = A221528(n)/4. EXAMPLE When written as an irregular triangle begins: 0; 1; 2; 4,4; 4,8,11,8; 4,8,16,24,16,20,25,16; 4,8,16,24,32,36,42,44,20,24,44,64,40,44,53,32; 4,8,16,24,32,36,44,52,42,48,64,100,80,84,91,84,28,24,48,72,92,104,124,132,54,56,100,144,88,92,109,64; CROSSREFS Row lengths give 1 together with A011782. Right border gives 0 together with A000079. Cf. A139251, A194701, A194445, A220501, A220521, A220524, A220527. Sequence in context: A231349 A170893 A194445 * A160809 A139251 A182635 Adjacent sequences:  A220522 A220523 A220524 * A220526 A220527 A220528 KEYWORD nonn,tabf AUTHOR Omar E. Pol, Mar 23 2013 STATUS approved

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Last modified May 30 09:23 EDT 2020. Contains 334718 sequences. (Running on oeis4.)