

A233763


Number of toothpicks or Dtoothpicks added at nth stage in the structure of the Dtoothpick "narrow" triangle of A233762.


2



0, 1, 2, 2, 4, 2, 4, 5, 8, 2, 4, 6, 12, 6, 8, 11, 16, 2, 4, 6, 12, 14, 16, 18, 24, 10, 8, 14, 28, 14, 16, 23, 32, 2, 4, 6, 12, 14, 16, 20, 32, 24, 20, 22, 40, 30, 40, 39, 48, 18, 8
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,3


COMMENTS

Essentially the first differences of A233762.


LINKS

Table of n, a(n) for n=0..50.
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
Index entries for sequences related to toothpick sequences


FORMULA

a(2n) = A220523(2n); a(2n+1) = A220523(2n+1)  2.


EXAMPLE

Written as an irregular triangle in which the row lengths is A011782 the sequence (starting from 1) begins:
1;
2;
2,4;
2,4,5,8;
2,4,6,12,6,8,11,16;
2,4,6,12,14,16,18,24,10,8,14,28,14,16,23,32;
2,4,6,12,14,16,20,32,24,20,22,40,30,40,39,48,18,8,...
Right border gives A000079.


CROSSREFS

Cf. A000079, A011782, A139251, A220501, A220523, A233761, A233762.
Sequence in context: A079314 A060609 A205138 * A109526 A260723 A059214
Adjacent sequences: A233760 A233761 A233762 * A233764 A233765 A233766


KEYWORD

nonn,tabf,more


AUTHOR

Omar E. Pol, Dec 15 2013


STATUS

approved



