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A233763 Number of toothpicks or D-toothpicks added at n-th stage in the structure of the D-toothpick "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

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Last modified June 25 20:23 EDT 2017. Contains 288729 sequences.