

A212009


Number of toothpicks or Dtoothpicks added at nth stage in the toothpick structure of A212008.


3



0, 1, 4, 8, 16, 22, 20, 24, 36, 40, 32, 44, 56, 94, 60, 56, 76, 72, 32, 48, 72, 112, 132, 140, 136, 168, 112, 132, 140, 238, 148, 120, 156, 136, 32, 48, 72, 112, 132
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OFFSET

0,3


COMMENTS

Essentially the first differences of A212008.


LINKS

Table of n, a(n) for n=0..38.
David Applegate, The movie version
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
Index entries for sequences related to toothpick sequences


FORMULA

It appears that a(2^k + 2) = 32, if k >= 3.


EXAMPLE

When written as an irregular triangle:
0;
1;
4;
8;
16,22;
20,24,36,40;
32,44,56,94,60,56,76,72;
32,48,72,112,132,140,136,168,112,132,140,238,148,120,156,136;
32,48,72,112,132,...


CROSSREFS

Cf. A139250, A139251, A194271, A194433, A194435, A194441, A194443, A194445, A220501.
Sequence in context: A312808 A249486 A129370 * A312809 A312810 A194271
Adjacent sequences: A212006 A212007 A212008 * A212010 A212011 A212012


KEYWORD

nonn,tabf,more


AUTHOR

Omar E. Pol, Dec 15 2012


STATUS

approved



