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

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

Offset: 0

Author

Philippe Deléham, Dec 11 2007

Keywords

• nonn
• easy

Comments

Hankel transform of A132863 .

Links

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

Programs

Mathematica

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

PARI

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

Formula

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