A281997 a(n) = (n-1)^n * n^n.

0, 4, 216, 20736, 3200000, 729000000, 230539333248, 96717311574016, 51998697814228992, 34867844010000000000, 28531167061100000000000, 27982542656501458535448576, 32405578483833249047003529216, 43752153272681450786889799450624

Offset

1,2

Links

Table of n, a(n) for n=1..14.

Formula

a(n) ~ A174881(n) / e^2.

a(n) = A007778(n-1)*A000312(n). - Felix Fröhlich, Feb 05 2017

Mathematica

Table[(n (n - 1))^n, {n, 14}] (* Michael De Vlieger, Feb 05 2017 *)

Prog

(PARI) a(n) = (n*(n-1))^n;

Crossrefs

Cf. A000312, A007778, A174881.

Sequence in context: A042325 A091287 A338282 * A276487 A269283 A055627

Adjacent sequences: A281994 A281995 A281996 * A281998 A281999 A282000

Keyword

easy,nonn

Author

Daniel Suteu, Feb 04 2017

Status

approved