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 A337425 #6 Aug 28 2020 11:04:29 %S A337425 0,23,113,563,1013,1823,70313,351563,82013,410063,43945313,1328603, %T A337425 18452813,1977539063,0,830376563,538084013,968551223,13452100313, %U A337425 1441625976563,43584805013,2145767211914063,0,0,9806581127813,6354664570823,681012578320313,441296150751563,0 %N A337425 a(n) is the least prime of the form (3^j*5^k + 1)/2, j > 0, k > 0, j + k = n. a(n) = 0 if no such prime exists. %Y A337425 Cf. A093625, A076481, A337423, A337424, A337426. %K A337425 nonn %O A337425 2,2 %A A337425 _Hugo Pfoertner_, Aug 27 2020