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A220526 Number of toothpicks and D-toothpicks after n-th stage in the structure of the D-toothpick "medium" triangle of the third kind. 4
0, 1, 3, 7, 11, 15, 19, 26, 34, 38, 42, 50, 62, 76, 88, 103, 119, 123, 127, 135, 147, 163, 183, 207, 233 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

The structure is essentially one of the horizontal wedges of A220500. First differs from A194442 (and from A220522) at a(13). A220527 (the first differences) give the number of toothpicks or D-toothpicks added at n-th stage.

LINKS

Table of n, a(n) for n=0..24.

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Index entries for sequences related to toothpick sequences

CROSSREFS

Cf. A139250, A194270, A194440, A194700, A194442, A220500, A220512, A220514, A220520, A220522, A220524, A220527.

Sequence in context: A220496 A194442 A220522 * A034934 A191151 A220494

Adjacent sequences:  A220523 A220524 A220525 * A220527 A220528 A220529

KEYWORD

nonn,more

AUTHOR

Omar E. Pol, Jan 02 2013

STATUS

approved

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Last modified January 24 07:11 EST 2020. Contains 331189 sequences. (Running on oeis4.)