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 A261471 #11 Aug 20 2015 16:34:06
%S A261471 1,1,3,31,553,14281,517681,25396561,1625662081,131681531521,
%T A261471 13168185811201,1593350882323201,229442532323558401,
%U A261471 38775788037405619201,7600054456464819148801,1710012252722891749632001,437763136697374129754112001,126513546505546814497787904001
%N A261471 Cyclotomic polynomial value Phi(6,n!).
%H A261471 Robert Price, <a href="/A261471/b261471.txt">Table of n, a(n) for n = 0..100</a>
%H A261471 OEIS Wiki, <a href="https://oeis.org/wiki/Cyclotomic Polynomials at x=n, n! and sigma(n)">Cyclotomic Polynomials at x=n, n! and sigma(n)</a>
%F A261471 a(n) = A002061(n!).
%t A261471 Table[Cyclotomic[6, n!], {n, 0, 200}]
%o A261471 (PARI) vector(20, n, n--; polcyclo(6, n!)) \\ _Michel Marcus_, Aug 20 2015
%Y A261471 Cf. A002061, A200906, A259264, A259265.
%K A261471 nonn
%O A261471 0,3
%A A261471 _Robert Price_, Aug 20 2015