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A117266
Row sums of triangle A117265.
1
1, 2, 6, 37, 497, 14033, 813857, 95996993, 22913626241, 11034472530177, 10699863490757121, 20863301244829828097, 81721932792141693585409, 642577422892784159654154241, 10136733849914528413869372612609
OFFSET
0,2
FORMULA
a(n) = Sum_{k=0..n} (2*(n-k))!/((n-k)!*(n-k)!)*2^((n-k)*(n+k-3)/2).
PROG
(PARI) a(n)=sum(k=0, n, (2*(n-k))!/((n-k)!*(n-k)!)*2^((n-k)*(n+k-3)/2))
CROSSREFS
Cf. A117265.
Sequence in context: A014056 A241300 A113375 * A259437 A202737 A186648
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Mar 14 2006
STATUS
approved