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 A125706 #8 Jul 29 2024 06:18:53
%S A125706 0,1,3,9,13,25,27,29,95,107,153,159,675,1633,1693,2337,25998,64289
%N A125706 Numbers k such that 6^k + 3^k + 2^k = A074528(k) is a prime.
%C A125706 Corresponding primes of the form 6^k + 3^k + 2^k are {3, 11, 251, 10097891, 13062296531, 28430288877251865251, 1023490376703200952251, 36845653355419807219091, 84017312692910353150294530243640676594723260464784043666542128557055486251, ...}.
%t A125706 Do[f=6^n+3^n+2^n;If[PrimeQ[f],Print[{n,f}]],{n,1,675}]
%Y A125706 Cf. A074528.
%K A125706 hard,more,nonn
%O A125706 1,3
%A A125706 _Alexander Adamchuk_, Jan 31 2007
%E A125706 More terms from _Ryan Propper_, Mar 30 2007
%E A125706 a(18) from _Michael S. Branicky_, Jul 28 2024