A010800 a(n) = n! * (n+1)! * (n+2)! * (n+3)! * (n+4)! * (n+5)! / (2! * 3! * 4! * 5! * 6!).

1, 5040, 101606400, 6145155072000, 929147446886400000, 309071606732292096000000, 205619158526859285626880000000, 254046582743105184577722777600000000, 549289359343832305886569080815616000000000, 1979419135331434097492840339627153817600000000000

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

• Seiichi Manyama, Table of n, a(n) for n = 1..102
• Index entries for sequences related to factorial numbers

Crossrefs

Column 6 in triangle A009963.

Programs

Mathematica

Module[{nn=20,c=Times@@(Range[2,6]!)},(Times@@@Partition[ Range[ nn]!, 6,1])/c] (* Harvey P. Dale, Jul 29 2015 *)

Extensions

More terms from Harvey P. Dale, Jul 29 2015

Offset changed to 1 by Seiichi Manyama, Aug 14 2023