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A047069 T(2n,n), array T as in A047060. 0
1, 2, 9, 50, 292, 1771, 10935, 68383, 431899, 2748889, 17603784, 113299016, 732218152, 4748569471, 30886615145, 201412503840, 1316341486144, 8619854957691, 56543637427530, 371482805504922, 2443971459882487 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..20.

CROSSREFS

Sequence in context: A274066 A055997 A115599 * A225006 A211789 A192945

Adjacent sequences:  A047066 A047067 A047068 * A047070 A047071 A047072

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 16 20:34 EDT 2018. Contains 316275 sequences. (Running on oeis4.)