A002679 Denominator of 2*Stirling_2(n,2)/n!. (Formerly M4820 N2062)

1, 1, 12, 4, 360, 40, 20160, 12096, 259200, 604800, 239500800, 760320, 43589145600, 217945728000, 1494484992000, 697426329600, 3201186852864000, 16937496576000, 1216451004088320000, 30964207376793600, 11469395181404160000

Offset

2,3

References

H. E. Salzer, Tables of coefficients for differences in terms of the derivatives, Journal of Mathematics and Physics, 23 (1944), 210-212.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

T. D. Noe, Table of n, a(n) for n=2..100

Index entries for sequences related to Bernoulli numbers.

Crossrefs

Cf. A002678 (numerators).

Sequence in context: A107670 A157782 A335949 * A282578 A205141 A122561

Adjacent sequences: A002676 A002677 A002678 * A002680 A002681 A002682

Keyword

nonn,frac

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Dec 20 2016

Status

approved