Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #7 Oct 12 2016 15:17:49
%S 1,12,2304,7077888,347892350976,273593677362757632,
%T 3442605166011971360784384,693087965674784425268322477539328,
%U 2232592609368277258783200799359831235362816
%N a(n) = 3^n * 4^(n^2).
%C Hankel transform of A132863 .
%H G. C. Greubel, <a href="/A135398/b135398.txt">Table of n, a(n) for n = 0..25</a>
%F a(n) = 3^n*4^(n^2) = A000244(n)*A060757(n).
%t Table[3^n*4^(n^2), {n, 0, 10}] (* _G. C. Greubel_, Oct 12 2016 *)
%o (PARI) a(n)=3^n*4^n^2 \\ _Charles R Greathouse IV_, Oct 12 2016
%K nonn,easy
%O 0,2
%A _Philippe Deléham_, Dec 11 2007