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 A265013 #16 Sep 08 2022 08:46:14 %S A265013 2,12382,27608,31330,117852 %N A265013 Numbers n such that n*9^n + 1 is prime. %C A265013 All terms are even. - _Robert Israel_, Jan 18 2016 %t A265013 Select[Range[100000], PrimeQ[# 9^# + 1] &] %o A265013 (PARI) for(n=1,100000, if(isprime(n*9^n+1), print1(n,", "))) %o A265013 (Magma) [n: n in [0..100000] | IsPrime(n*9^n+1)]; %Y A265013 Cf. A005849, A006552, A007646, A242176, A242177, A242178, A007647, A242196, A242197, A242198, A242199, A007648. %K A265013 nonn,more,hard %O A265013 1,1 %A A265013 _Tim Johannes Ohrtmann_, Nov 30 2015