A135398 a(n) = 3^n * 4^(n^2).

1, 12, 2304, 7077888, 347892350976, 273593677362757632, 3442605166011971360784384, 693087965674784425268322477539328, 2232592609368277258783200799359831235362816

Offset

0,2

Comments

Hankel transform of A132863 .

Links

G. C. Greubel, Table of n, a(n) for n = 0..25

Formula

a(n) = 3^n*4^(n^2) = A000244(n)*A060757(n).

Mathematica

Table[3^n*4^(n^2), {n, 0, 10}] (* G. C. Greubel, Oct 12 2016 *)

Prog

(PARI) a(n)=3^n*4^n^2 \\ Charles R Greathouse IV, Oct 12 2016

Crossrefs

Sequence in context: A205306 A268421 A129206 * A203426 A268589 A372343

Adjacent sequences: A135395 A135396 A135397 * A135399 A135400 A135401

Keyword

nonn,easy

Author

Philippe Deléham, Dec 11 2007

Status

approved