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 A261128 #23 Aug 27 2015 09:25:14
%S A261128 7,7,127,55987,199411801,3011076302521,139507830379527121,
%T A261128 16393413624509530430641,4296688920209982460579470721,
%U A261128 2283386315992292963858620174289281,2283380652830226414943490202201665068801,4045147099313653802803680147635052518194156801
%N A261128 Cyclotomic polynomial value Phi(7,n!).
%H A261128 Robert Price, <a href="/A261128/b261128.txt">Table of n, a(n) for n = 0..100</a>
%H A261128 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 A261128 a(n) = A053716(n!) for n>0.
%t A261128 Table[Cyclotomic[7, n!], {n, 0, 200}]
%o A261128 (PARI) a(n) = polcyclo(7, n!) \\ _Michel Marcus_, Aug 22 2015
%Y A261128 Cf. A053716, A200906, A259264, A259265.
%K A261128 nonn
%O A261128 0,1
%A A261128 _Robert Price_, Aug 20 2015