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 A191054 #16 Sep 08 2022 08:45:57 %S A191054 5,19,23,29,31,41,43,47,53,59,73,79,83,89,97,107,113,127,167,179,191, %T A191054 211,223,227,229,233,241,263,271,277,293,307,337,347,349,353,373,383, %U A191054 389,397,409,443,461,479,491,509,547,569,571,577,587,593,599,619,641 %N A191054 Primes p such that Jacobi(p,91) = 1. %C A191054 Originally incorrectly named "Primes that are squares mod 91", which is sequence A106989, and a subsequence of this one, because these primes have (p|7) = (p|13) = 1. The present sequence includes also primes with (p|7) = (p|13) = -1. - _David Broadhurst_ and _M. F. Hasler_, Jan 15 2016 %H A191054 Vincenzo Librandi, <a href="/A191054/b191054.txt">Table of n, a(n) for n = 1..1000</a> %t A191054 Select[Prime[Range[200]], JacobiSymbol[#,91]==1&] %o A191054 (Magma) [p: p in PrimesUpTo(641) | JacobiSymbol(p, 91) eq 1]; // _Vincenzo Librandi_, Sep 10 2012 %o A191054 (PARI) is(p)=kronecker(p,91)==1&&isprime(p) \\ _M. F. Hasler_, Jan 15 2016 %K A191054 nonn,easy %O A191054 1,1 %A A191054 _T. D. Noe_, May 25 2011 %E A191054 Definition corrected, following a suggestion from _David Broadhurst_, by _M. F. Hasler_, Jan 15 2016