A210279 (6n)!/6^n.

1, 120, 13305600, 29640619008000, 478741050720092160000, 34111736086958726676480000000, 7973107998754741458076119859200000000, 5019026197962676820927435579005599744000000000

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..80

Formula

E.g.f.: 1/(1-x^6/6).

Mathematica

Table[(6 n)!/6^n, {n, 0, 11}] (* Vincenzo Librandi, Feb 15 2013 *)
With[{nn=50}, Take[CoefficientList[Series[1/(1-x^6/6), {x, 0, nn}], x] Range[0, nn-2]!, {1, -1, 6}]] (* Harvey P. Dale, Sep 25 2023 *)

Prog

(Magma) [Factorial(6*n)/6^n: n in [0..10]]; // Vincenzo Librandi, Feb 15 2013

Crossrefs

Cf. A210278, A210277, A000680, A067630, A084939, A084940, A084941, A084942, A084943, A084944, A087127, A001147, A132101

Sequence in context: A100734 A115463 A003922 * A367569 A172626 A258926

Adjacent sequences: A210276 A210277 A210278 * A210280 A210281 A210282

Keyword

nonn,easy

Author

Mohammad K. Azarian, Apr 12 2012

Status

approved