A091483 a(n) = (4*n)^n.

1, 4, 64, 1728, 65536, 3200000, 191102976, 13492928512, 1099511627776, 101559956668416, 10485760000000000, 1196683881290399744, 149587343098087735296, 20325604337285010030592, 2982856619293778479415296, 470184984576000000000000000

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..100

Formula

E.g.f.: 1/(1 + LambertW(-4*x)). - Ilya Gutkovskiy, Oct 03 2017

Mathematica

Join[{1}, Table[(4n)^n, {n, 20}]] (* Harvey P. Dale, Feb 11 2024 *)

Prog

(PARI) a(n) = (4*n)^n; \\ Joerg Arndt, Feb 23 2014
(Magma) [(4*n)^n: n in [0..20]]; // Vincenzo Librandi, Feb 24 2014

Crossrefs

Cf. A062971, A091482.

Sequence in context: A352275 A146341 A264335 * A263988 A208357 A050636

Adjacent sequences: A091480 A091481 A091482 * A091484 A091485 A091486

Keyword

nonn

Author

Christian G. Bower, Jan 13 2004

Extensions

More terms from Vincenzo Librandi, Feb 24 2014

Status

approved