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 A317886 #46 Jul 05 2025 16:22:22 %S A317886 0,1,2,25,26,70,130,784,818,895,7843,41294,114458,160663,281143 %N A317886 Numbers m such that 11^m + 6 is prime. %C A317886 a(12) > 35000, if it exists. - _Giovanni Resta_, Aug 10 2018 %C A317886 For m = 3*k, (11^m + 6)/7 is an integer, so there are no multiples of 3 in this sequence. %C A317886 After a(2), there are no terms congruent to 1 mod 16, because 11^(16*k+1) + 6 is divisible by 17. - _Bruno Berselli_, Sep 20 2018 %e A317886 11^2 + 6 = 127 is prime, hence 2 is a term. %t A317886 Select[Range[0, 5000], PrimeQ[11^# + 6] &] %o A317886 (PARI) for(n=0, 5000, if(ispseudoprime(11^n+6), print1(n, ", "))) %Y A317886 Cf. A109076. %K A317886 nonn,more %O A317886 1,3 %A A317886 _Jinyuan Wang_, Aug 09 2018 %E A317886 a(11) from _Giovanni Resta_, Aug 10 2018 %E A317886 a(12) from Lelio R Paula, Feb 02 2021 %E A317886 a(13)-a(14) from _Paul Bourdelais_, Feb 26 2021 %E A317886 a(15) from _Paul Bourdelais_, Mar 03 2021