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 A292012 #7 Nov 11 2019 13:56:33
%S A292012 7,73,262657,18837001,77158673929,5302306226370307681801,
%T A292012 328017025014102923449988663752960080886511412965881,
%U A292012 6113142872404227834840443898241613032969,34175792320105064276509600649933535697253970335472049142780400956425111741139140798213387072831489
%N A292012 Primes of the form Phi(k, 8), where Phi is the cyclotomic polynomial.
%H A292012 Yves Gallot, <a href="http://yves.gallot.pagesperso-orange.fr/papers/cyclotomic.html">Cyclotomic polynomials and prime numbers</a>
%H A292012 <a href="/index/Cy#CyclotomicPolynomialsValuesAtX">Index entries for cyclotomic polynomials,values at X</a>
%t A292012 Select[Table[Cyclotomic[k,8], {k, 0, 100}], PrimeQ[#] &]
%Y A292012 Cf. A138938.
%K A292012 nonn
%O A292012 1,1
%A A292012 _Robert Price_, Sep 07 2017