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 A292161 #12 Oct 29 2022 15:15:58
%S A292161 1,-1,-4,-18,-32,-75,1188,2205,7936,19278,49500,87120,185760,312988,
%T A292161 574868,-10481175,-15271936,-46022672,-98470404,-230150496,-440484000,
%U A292161 -932930208,-1572331596,-2940575576,-4940815104,-8508211250,-13542949524,-22406625648
%N A292161 Main diagonal of A292159.
%F A292161 a(n) + i*A292162(n) = [x^n] Product_{k>=0} (1 - n*i*x^k), where i is sqrt(-1).
%Y A292161 Cf. A292159, A292162.
%K A292161 sign
%O A292161 0,3
%A A292161 _Seiichi Manyama_, Sep 10 2017