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A220512 D-toothpick 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 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
This is a toothpick sequence of forking paths to 135 degrees. The sequence gives the number of toothpicks and D-toothpicks in the structure after n-th stage. A221565 (the first differences) give the number of toothpicks or D-toothpicks added at n-th stage. It appears that the structure has a fractal (or fractal-like) behavior. For more information see A194700.
First differs from A194432 at a(14).
LINKS
CROSSREFS
Sequence in context: A009906 A357719 A194432 * A194434 A220514 A301005
KEYWORD
nonn,more
AUTHOR
Omar E. Pol, Dec 15 2012
STATUS
approved

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Last modified June 23 14:31 EDT 2024. Contains 373651 sequences. (Running on oeis4.)