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 A292132 #21 Sep 11 2017 09:37:44
%S A292132 1,-1,-2,6,12,45,-150,-203,-840,-1872,6390,8580,30084,69108,165802,
%T A292132 -494565,-514320,-1997296,-4202298,-10175526,-18908420,49930440,
%U A292132 54032770,190735688,405256872,948210600,1751280726,3624555168,-7676955468,-6724059944,-26741354430
%N A292132 Main diagonal of A292131.
%H A292132 Seiichi Manyama, <a href="/A292132/b292132.txt">Table of n, a(n) for n = 0..1000</a>
%F A292132 a(n) = [x^n] Product_{k=1..n} (1 - n*x^k).
%o A292132 (PARI) {a(n) = polcoeff(prod(k=1, n, 1-n*x^k+x*O(x^n)), n)}
%Y A292132 Cf. A124577, A291698, A292131.
%K A292132 sign
%O A292132 0,3
%A A292132 _Seiichi Manyama_, Sep 09 2017