A162992 The second right hand column of triangle A162990.

36, 144, 1600, 32400, 1016064, 45158400, 2687385600, 205752960000, 19670999040000, 2294425328025600, 320461058211840000, 52778155948277760000, 10118415696592896000000, 2233485391313240064000000

Offset: 2

Author

Johannes W. Meijer, Jul 21 2009

Keywords

• easy
• nonn

Crossrefs

A052747(n+1) equals the square root of a(n).

A162991 is the first right hand column of triangle A162990.

Programs

Mathematica

Array[((#+1)!/(#-1))^2 &, 20, 2] (* Paolo Xausa, Apr 01 2024 *)

Formula

a(n) = ((n+1)!/(n-1))^2 for n = 2, 3, ... .

a(n) = A052747(n+1)^2.