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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 23 10:34 EDT 2024. Contains 372760 sequences. (Running on oeis4.)