A135315 a(n) = 8^n * 7^(n^2).

1, 56, 153664, 20661046784, 136122083613085696, 43944136529148801869643776, 695135330857032999706040305346412544, 538807794445443668301287736683760181725850763264

Offset

0,2

Comments

Hankel transform of A130979 .

Links

G. C. Greubel, Table of n, a(n) for n = 0..30

Formula

a(n) = 8^n * 7^(n^2) = A001018(n) * A060759(n) .

Mathematica

Table[8^n*7^(n^2), {n, 0, 10}] (* G. C. Greubel, Oct 09 2016 *)

Prog

(PARI) a(n)=8^n*7^(n^2) \\ Charles R Greathouse IV, Oct 09 2016

Crossrefs

Sequence in context: A308390 A093256 A177325 * A135426 A028670 A278608

Adjacent sequences: A135312 A135313 A135314 * A135316 A135317 A135318

Keyword

nonn,easy

Author

Philippe Deléham, Dec 05 2007

Status

approved