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A049164 Recip transform of 2*(1 + x^2 + x^4 + x^6)-1/(1-x). 0
1, 1, 1, 1, 1, 1, 1, 1, 3, 23, 135, 599, 2187, 6947, 19899, 52667, 131109, 311525, 717525, 1635781, 3802461, 9332573, 24773869, 70874381, 212534247, 646664443, 1949536667, 5749101579, 16503012263, 46118290863 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,9

COMMENTS

Sign diagram of generating sequence: +-+-+-+--------...

LINKS

Table of n, a(n) for n=0..29.

CROSSREFS

Sequence in context: A154648 A031970 A196881 * A081413 A179328 A255952

Adjacent sequences:  A049161 A049162 A049163 * A049165 A049166 A049167

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified July 4 12:18 EDT 2020. Contains 335448 sequences. (Running on oeis4.)