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 A342364 #11 Mar 09 2021 11:12:35 %S A342364 3,17,73,191,709,1289,3181,5449,7681,17477,33889,87961,437389,2290573, %T A342364 7160227,10429681,19196227,24504049,47577857,70513979,82605937, %U A342364 156671243,271785793,328939937,568119509,1125978241,1534657963,1710749497,4936728373,7647104183 %N A342364 The primes associated with A239727. %H A342364 Jianing Song, <a href="/A342364/b342364.txt">Table of n, a(n) for n = 1..40</a> %F A342364 a(n) = 2*A239727(n)*A239746(n) + 1. %e A342364 The smallest prime of the form 2*A239727(3)*k + 1 = 24*k+1 is 73, hence a(3) = 73. %e A342364 The smallest prime of the form 2*A239727(4)*k + 1 = 38*k+1 is 191, hence a(4) = 191. %o A342364 (PARI) A016014(n)=my(k); while(!isprime(2*n*k+++1), ); k %o A342364 r=0; for(n=1, 1e8, t=A016014(n); if(t>r, r=t; print1(2*n*r+1", "))) \\ based on the program of A239727 %Y A342364 Cf. A239727, A239746, A016014, A070846, A342365. %K A342364 nonn %O A342364 1,1 %A A342364 _Jianing Song_, Mar 09 2021