A135428 a(n) = 9^n * 10^(n^2).

1, 90, 810000, 729000000000, 65610000000000000000, 590490000000000000000000000000, 531441000000000000000000000000000000000000

Offset: 0

Author

Philippe Deléham, Dec 12 2007

Keywords

• nonn

Comments

Hankel transform of A132897.

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..30

Crossrefs

Cf. A001019, A076782, A132897.

Programs

Magma

[9^n*10^(n^2): n in [0..10]]; // Vincenzo Librandi, May 26 2011

Mathematica

Table[9^n * 10^(n^2), {n,0,10}] (* G. C. Greubel, Oct 14 2016 *)

Formula

a(n) = 9^n*10^(n^2) = A001019(n)*A076782(n).