This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A276755 #4 Sep 17 2016 00:20:08
%S A276755 1,1,5,65,1625,66625,4330625,489360625,110106140625,52961053640625,
%T A276755 54285079981640625,114704374001206640625,484625980155098056640625,
%U A276755 4032572780870570929306640625
%N A276755 a(n) = A275706(n)^2 + A276688(n)^2 = [n]_{1+i}! * [n]_{1-i}!, where [n]_q! is the q-factorial, i = sqrt(-1).
%F A276755 a(n) = |[n]_{1+i}!|^2.
%F A276755 a(n+1)/a(n) = 4*A038505(n) + 1.
%t A276755 Table[QFactorial[n, 1 + I] QFactorial[n, 1 - I], {n, 0, 20}]
%Y A276755 Cf. A275706, A276688, A038505.
%K A276755 nonn
%O A276755 0,3
%A A276755 _Vladimir Reshetnikov_, Sep 16 2016