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 A186105 #13 Sep 03 2025 20:09:48 %S A186105 19,109,3889,139969,839809,5038849,1088391169,1410554953729, %T A186105 511745184538734624769,110536959860366678949889, %U A186105 2424843832394292181929418801369608880129 %N A186105 Primes of the form 3*6^k+1. %C A186105 The values of k (1,2,4,6,7,8,11,15,26,29,50) are in A186112. %e A186105 3*6^15+1 = 1410554953729 is prime. %Y A186105 Cf. A186112. %K A186105 nonn,changed %O A186105 1,1 %A A186105 _Gilbert Mozzo_, Feb 12 2011