A001347 a(n) = Sum_{k=0..5} (n+k)! * C(5,k). (Formerly M5361 N2328)

88, 326, 1631, 10112, 74046, 622704, 5900520, 62118720, 718709040, 9059339520, 123521086080, 1810829260800, 28397649772800, 474281518233600, 8403557607244800, 157429696667443200, 3108814043182848000, 64537726313668608000, 1405033277277966336000

Offset

-1,1

References

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 = -1..100

E. Biondi, L. Divieti, G. Guardabassi, Counting paths, circuits, chains and cycles in graphs: A unified approach, Canad. J. Math. 22 1970 22-35.

Mathematica

Join[{88}, Table[Sum[(n + k)! Binomial[5, k], {k, 0, 5}], {n, 0, 20}]] (* T. D. Noe, Jun 28 2012 *)

Crossrefs

Sequence in context: A304519 A261142 A328872 * A003782 A235026 A323612

Adjacent sequences: A001344 A001345 A001346 * A001348 A001349 A001350

Keyword

nonn

Author

N. J. A. Sloane

Status

approved