|
%I #9 Oct 13 2016 22:08:08
%S 1,20,10000,125000000,39062500000000,305175781250000000000,
%T 59604644775390625000000000000,
%U 291038304567337036132812500000000000000,35527136788005009293556213378906250000000000000000
%N a(n) = 4^n * 5^(n^2).
%C Hankel transform of A132864.
%C For n>0, a(n) is even with a last digit of 0 and is 1 when n=0. - _Wesley Ivan Hurt_, Dec 04 2013
%H G. C. Greubel, <a href="/A135420/b135420.txt">Table of n, a(n) for n = 0..25</a>
%F a(n) = 4^n*5^(n^2) = A000302(n) * A060758(n).
%p A135420:=n->4^n*5^(n^2); seq(A135420(n), n=0..10); # _Wesley Ivan Hurt_, Dec 04 2013
%t Table[4^n*5^(n^2), {n,0,10}] (* _Wesley Ivan Hurt_, Dec 04 2013 *)
%K nonn
%O 0,2
%A _Philippe Deléham_, Dec 11 2007
| 