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 A285810 #7 Apr 27 2017 10:45:17 %S A285810 2,7,17,107,227,277,457,857,1627,3517,4517,5407,9767,11057,13877, %T A285810 15017,16607,20477,23767,26267,27827,35107,37517,41927,42577,50767, %U A285810 53657,58907,62017,68477,79657,83267,86027,93607,98507,110777,113957,128257,137477,145807 %N A285810 Primes equal to a centered pentagonal number plus 1. %H A285810 Colin Barker, <a href="/A285810/b285810.txt">Table of n, a(n) for n = 1..1000</a> %o A285810 (PARI) cpg(m, n) = m*n*(n-1)/2+1 \\ n-th centered m-gonal number %o A285810 maxk=600; L=List(); for(k=1, maxk, if(isprime(p=cpg(5, k) + 1), listput(L, p))); Vec(L) %Y A285810 Cf. A000040, A005891, A285809, A285811, A285812. %K A285810 nonn %O A285810 1,1 %A A285810 _Colin Barker_, Apr 27 2017