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 A220520 Number of toothpicks and D-toothpicks after n-th stage in the D-toothpick "wide" triangle of the third kind. 14
 0, 1, 3, 7, 11, 15, 19, 27, 35, 39, 43, 51, 63, 79, 91, 107, 123, 127, 131, 139, 151, 167, 187, 211, 237, 261, 273, 293, 325, 365, 393, 425, 457, 461, 465, 473, 485, 501, 521, 545, 571, 595, 615, 647, 691, 755, 807, 855, 909, 944, 961, 981, 1017, 1065 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS The structure is essentially one of the vertical wedges of several D-toothpick structures. For more information see A220500. First differs from A194440 at a(14). The first differences (A220521) give the number of toothpicks or D-toothpicks added at n-th stage. See A220522 for the "narrow" triangle of the third kind. LINKS Omar E. Pol, Illustration of the structure after 32 stages Omar E. Pol, Illustration of the structure after 64 stages N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS CROSSREFS Cf. A047999, A139250, A194270, A194440, A194442, A220494, A220521, A220522. Sequence in context: A191151 A220494 A194440 * A228436 A189364 A022797 Adjacent sequences:  A220517 A220518 A220519 * A220521 A220522 A220523 KEYWORD nonn AUTHOR Omar E. Pol, Dec 15 2012 STATUS approved

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Last modified October 22 22:34 EDT 2019. Contains 328335 sequences. (Running on oeis4.)