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A124078
a(n) = H(n)*n!/(floor(n/2))!, where H(n) = sum{k=1 to n} 1/k, the n-th harmonic number.
3
0, 1, 3, 11, 25, 137, 294, 2178, 4566, 42774, 88572, 1004532, 2064504, 27503832, 56243184, 860945040, 1754322480, 30342400560, 61664980320, 1189277851680, 2412077832000, 51324077044800, 103928089910400, 2418504655996800
OFFSET
0,3
MATHEMATICA
f[n_] := HarmonicNumber[n]n!/Floor[n/2]!; Table[f@n, {n, 0, 23}] - Robert G. Wilson v, Nov 26 2006
CROSSREFS
Sequence in context: A231606 A096617 A025529 * A096795 A362176 A160039
KEYWORD
easy,nonn
AUTHOR
Leroy Quet, Nov 24 2006
EXTENSIONS
More terms from Robert G. Wilson v, Nov 26 2006
STATUS
approved