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 A261472 #5 Aug 20 2015 16:33:13
%S A261472 3,31,14281,25396561,
%T A261472 273552658381614558353373506071127403199540399874192973440773009599175173339925708800000001
%N A261472 Primes of the form Phi(6,n!), where Phi is the cyclotomic polynomial.
%H A261472 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>
%t A261472 Select[Table[Cyclotomic[6, n!], {n, 0, 200}], PrimeQ]
%Y A261472 Cf. A002061, A200906, A259264, A259265.
%K A261472 nonn
%O A261472 1,1
%A A261472 _Robert Price_, Aug 20 2015