A211974 - OEIS

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A211974

Number of E-toothpicks added at n-th stage in the structure of A161336.

2

0, 1, 1, 1, 3, 1, 3, 3, 3, 5, 3, 5, 7, 1, 3, 3, 5, 9, 5, 13, 7, 9, 13, 7, 11, 13, 3, 7, 7, 9, 15, 11, 21, 15, 15, 17, 11, 13, 15, 15, 15, 9, 11, 19, 13, 21, 21, 17, 17, 23, 17, 27, 17, 19, 27, 21, 27, 19, 17, 17, 21, 31, 31, 25, 23

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,5

COMMENTS

Essentially the first differences of A161336.

LINKS

Table of n, a(n) for n=0..64.

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Index entries for sequences related to toothpick sequences

FORMULA

a(n) = A161331(n+1)/6, n >= 1.

CROSSREFS

Cf. A139250, A139251, A161328, A161330, A213360, A211976.

Sequence in context: A042951 A194299 A029154 * A136297 A243339 A244965

Adjacent sequences: A211971 A211972 A211973 * A211975 A211976 A211977

KEYWORD

nonn

AUTHOR

Omar E. Pol, Dec 15 2012

STATUS

approved