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A337267 A335703(2n). 3
1, 3, 9, 30, 95, 326, 1195, 4478, 17251, 67326, 266331, 1058146, 4216075, 16808282, 67130923, 268281390, 1072424939 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

CROSSREFS

Cf. A328078, A335703, A337268, A337269.

Sequence in context: A074003 A078844 A144817 * A337034 A250128 A199137

Adjacent sequences:  A337264 A337265 A337266 * A337268 A337269 A337270

KEYWORD

nonn,more

AUTHOR

Rémy Sigrist and N. J. A. Sloane, Aug 26 2020

STATUS

approved

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Last modified March 1 02:43 EST 2021. Contains 341732 sequences. (Running on oeis4.)