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 A156048 #22 Aug 19 2021 21:24:03 %S A156048 32377,10908137,34030327,4860035567,7656800897,13398374537, %T A156048 41162676047,49277997407,169906146727,429221023247,517971170207, %U A156048 1587472376807,1692526508927,2687542461767,2827976112047,2918988711407,3538852646177,3843606175697,3868058416007,4090897510247 %N A156048 Odd prime numbers p with the property that (2^p + p^2) == 0 (mod (p+2)). %C A156048 Subsequence of A114977 and of A156038. - _Michel Marcus_, Oct 19 2013 %H A156048 Giovanni Resta, <a href="/A156048/b156048.txt">Table of n, a(n) for n = 1..31</a> (terms < 10^13) %o A156048 (PARI) isok(n) = isprime(n) && (n != 2) && ((2^n+n^2)% (n+2) == 0); \\ _Michel Marcus_, Oct 19 2013 %o A156048 (PARI) is(n)=Mod(2,n+2)^n==-4 && n>2 && isprime(n) \\ _Charles R Greathouse IV_, Oct 19 2013 %Y A156048 Cf. A114977, A156038. %K A156048 nonn %O A156048 1,1 %A A156048 _Zak Seidov_, Oct 31 2009 %E A156048 a(5) from _Zak Seidov_, Oct 31 2009 %E A156048 a(6)-a(8) from _Juri-Stepan Gerasimov_, Jan 16 2020 %E A156048 Terms a(9) and beyond from _Giovanni Resta_, Jan 23 2020