

A220512


Dtoothpick sequence of the third kind starting with a cross formed by 4 toothpicks.


3



0, 4, 12, 28, 44, 60, 88, 136, 168, 184, 216, 280, 344, 424, 508, 620, 684, 700, 732, 796, 892, 1004, 1148, 1324, 1460, 1572, 1668, 1844, 2020, 2228, 2424, 2664, 2792, 2808, 2840, 2904, 3000, 3112, 3264
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OFFSET

0,2


COMMENTS

This is a toothpick sequence of forking paths to 135 degrees. The sequence gives the number of toothpicks and Dtoothpicks in the structure after nth stage. A221565 (the first differences) give the number of toothpicks or Dtoothpicks added at nth stage. It appears that the structure has a fractal (or likefractal) behavior. For more information see A194700.
First differs from A194432 at a(14).


LINKS

Table of n, a(n) for n=0..38.
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, A194432, A194700, A220500, A220514, A220520, A220522, A220524, A220526.
Sequence in context: A072182 A009906 A194432 * A194434 A220514 A301005
Adjacent sequences: A220509 A220510 A220511 * A220513 A220514 A220515


KEYWORD

nonn,more


AUTHOR

Omar E. Pol, Dec 15 2012


STATUS

approved



