A210279 (6n)!/6^n.

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

Offset: 0

Author

Mohammad K. Azarian, Apr 12 2012

Keywords

• nonn
• easy

Links

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

Crossrefs

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

Programs

Magma

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

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 *)

Formula

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