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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
OFFSET
0,2
CROSSREFS
Sequence in context: A323958 A306356 A188818 * A190315 A190253 A174687
KEYWORD
nonn
AUTHOR
Clark Kimberling. Definition revised Dec 08 2006
STATUS
approved