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
Programs
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Magma
[(3*n)^n : n in [0..20]]; // Zaki Khandaker, Jun 21 2015
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Mathematica
Join[{1}, Table[(3 n)^n, {n, 20}]] (* Vincenzo Librandi, Jun 21 2015 *) -
PARI
a(n) = (3*n)^n \\ Charles R Greathouse IV, Jun 21 2015
Formula
E.g.f.: 1/(1 + LambertW(-3*x)). - Ilya Gutkovskiy, Oct 03 2017