A091482 a(n) = (3*n)^n.

1, 3, 36, 729, 20736, 759375, 34012224, 1801088541, 110075314176, 7625597484987, 590490000000000, 50542106513726817, 4738381338321616896, 482880748567480579719, 53148384174432398229504, 6283298708943145751953125, 794071845499378503449051136

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Formula

E.g.f.: 1/(1 + LambertW(-3*x)). - Ilya Gutkovskiy, Oct 03 2017

Mathematica

Join[{1}, Table[(3 n)^n, {n, 20}]] (* Vincenzo Librandi, Jun 21 2015 *)

Prog

(Magma) [(3*n)^n : n in [0..20]]; // Zaki Khandaker, Jun 21 2015
(PARI) a(n) = (3*n)^n \\ Charles R Greathouse IV, Jun 21 2015

Crossrefs

Cf. A062971, A091483.

Sequence in context: A366004 A006587 A328122 * A121245 A193754 A377504

Adjacent sequences: A091479 A091480 A091481 * A091483 A091484 A091485

Keyword

nonn,easy

Author

Christian G. Bower, Jan 13 2004

Status

approved