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A132846
Column 0 of triangle A132845.
5
1, 1, 3, 13, 73, 466, 3309, 25425, 209717, 1837168, 16995545, 164906160, 1671977735, 17635855420, 193014602116, 2185071349740, 25536219128057, 307379906553394, 3804874686396912, 48350298542927709, 629940434070025851
OFFSET
0,3
FORMULA
a(n) = A132844(2n,0) = A132844(2n+1,0).
PROG
(PARI)
CROSSREFS
Cf. triangles: A132845, A132844; other columns: A132847, A132848, A132849.
Sequence in context: A063512 A199317 A205776 * A293196 A193931 A367757
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Sep 17 2007
STATUS
approved