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 A212557 #35 Jan 23 2015 02:47:11 %S A212557 67,877 %N A212557 Primes p such that (p, p-9) is an irregular pair. %C A212557 No further terms found up to 163577833 in extended tables (see Buhler link). - _Michel Marcus_, Apr 17 2014 %H A212557 Joe Buhler and David Harvey, <a href="http://web.maths.unsw.edu.au/~davidharvey/papers/irregular/">Irregular primes to 163 million</a>, 2009. %H A212557 W. Johnson, <a href="http://dx.doi.org/10.1090/S0025-5718-1975-0376606-9">Irregular primes and Cyclotomic Invariants</a>, Math. Comp., 1975, Vol. 29, No. 129, pp. 113-120. %o A212557 (PARI) is(n)=lift(Mod(numerator(bernfrac(n-9)), n)==0) %o A212557 forprime(p=8, , if(is(p), print1(p, ", "))) \\ _Felix Fröhlich_, Jan 19 2015 %Y A212557 Special instances of A000928. Variant of A088164 (for the terms of A088164, (p, p-3) is an irregular pair). %K A212557 nonn,hard,bref,more %O A212557 1,1 %A A212557 _Felix Fröhlich_, May 21 2012