A007339 a(n) = n! - n^3. (Formerly M4140)

1, 0, -6, -21, -40, -5, 504, 4697, 39808, 362151, 3627800, 39915469, 478999872, 6227018603, 87178288456, 1307674364625, 20922789883904, 355687428091087, 6402373705722168, 121645100408825141, 2432902008176632000

Offset

0,3

References

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

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..400

R. K. Hoeflin, Titan Test

Index entries for sequences related to factorial numbers

Formula

E.g.f.: 1/(1 - x) - x*(1 + 3*x + x^2)*exp(x). - Ilya Gutkovskiy, Jan 27 2017

Mathematica

Table[n!-n^3, {n, 0, 20}] (* Harvey P. Dale, Jul 02 2012 *)

Prog

(Magma) [Factorial(n)-n^3: n in [0..20]]; // Vincenzo Librandi, Oct 06 2011

Crossrefs

Cf. A000142, A000578.

Sequence in context: A031042 A064431 A031094 * A363621 A225150 A056237

Adjacent sequences: A007336 A007337 A007338 * A007340 A007341 A007342

Keyword

sign

Author

N. J. A. Sloane

Status

approved