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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..23.

MATHEMATICA

f[n_] := HarmonicNumber[n]n!/Floor[n/2]!; Table[f@n, {n, 0, 23}] - Robert G. Wilson v, Nov 26 2006

CROSSREFS

Cf. A123989, A124079.

Sequence in context: A231606 A096617 A025529 * A096795 A160039 A272296

Adjacent sequences:  A124075 A124076 A124077 * A124079 A124080 A124081

KEYWORD

easy,nonn

AUTHOR

Leroy Quet, Nov 24 2006

EXTENSIONS

More terms from Robert G. Wilson v, Nov 26 2006

STATUS

approved

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Last modified May 10 14:04 EDT 2021. Contains 343770 sequences. (Running on oeis4.)