
0, 1, 3, 7, 11, 15, 19, 27, 35, 39, 43, 51, 63, 79, 87, 103, 119, 123, 127, 135, 147, 163, 179, 203, 229, 253, 265, 285, 313, 353, 373, 405, 437, 441, 445, 453, 465, 481, 497, 521, 547, 571, 591, 623, 663, 727, 767, 815, 869, 909, 921, 941, 973, 1021
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OFFSET

0,3


COMMENTS

For the Dtoothpick "narrow" triangle of the second kind see A194442.
The structure is essentially one of the wedges of several Dtoothpick structures. For more information see A194270. The first differences (A194441) give the number of toothpicks or Dtoothpicks added at nth stage. [Omar E. Pol, Dec 29 2012]


LINKS

Table of n, a(n) for n=0..53.
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
Index entries for sequences related to toothpick sequences


CROSSREFS

Cf. A139250, A160120, A160406, A161830, A194270, A194277, A194441, A194442, A194444, A194692, A194693, A194696, A220494, A220520.
Sequence in context: A034934 A191151 A220494 * A220520 A228436 A189364
Adjacent sequences: A194437 A194438 A194439 * A194441 A194442 A194443


KEYWORD

nonn


AUTHOR

Omar E. Pol, Aug 29 2011


STATUS

approved

