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A047139 T(2n,n), array T as in A047130. 1
1, 2, 9, 48, 261, 1534, 9319, 56808, 353362, 2227380, 14099553, 89931668, 577292621, 3718701300, 24047442913, 156059054586, 1015345651345, 6621929417524, 43283675452318, 283439130488986, 1859169844171611 (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: A323958 A306356 A188818 * A190315 A190253 A174687

Adjacent sequences:  A047136 A047137 A047138 * A047140 A047141 A047142

KEYWORD

nonn

AUTHOR

Clark Kimberling. Definition revised Dec 08 2006

STATUS

approved

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Last modified May 25 11:27 EDT 2020. Contains 334592 sequences. (Running on oeis4.)