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 A337424 #4 Aug 28 2020 11:04:24 %S A337424 12,19,20,23,26,33,34,35,40,41,48,51,52,54,63,68,69,74,75,78,83,87,93, %T A337424 97,101,103,105,114,116,123,132,135,138,141,142,144,147,152,154,159, %U A337424 165,170,172,173,179,180,186,187,189,192,194,202,203,210,215,216,217,218,221 %N A337424 Sums s of positive exponents such that no prime of the form (3^j*5^k - 1)/2 with j + k = s exists. %Y A337424 Positions of 0 in A337423. %Y A337424 Cf. A336772, A337426. %K A337424 nonn %O A337424 1,1 %A A337424 _Hugo Pfoertner_, Aug 27 2020