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 A350629 #13 May 29 2022 18:07:16 %S A350629 2,4,18,24,36,42,48,54,60,66,72,78,90,96,102,108,114,120,126,132,138, %T A350629 144,150,156,162,168,174,180,186,192,198,204,210,216,222,228,234,240, %U A350629 252,258,264,270,276,282,288,294,300,306,312,318,324,328,330,336,342,348,354,360,366 %N A350629 Positive even numbers that cannot be written as 3^i (i >= 1) plus a prime. %C A350629 Indices of zeros in A350628 multiplied by 2. %Y A350629 Cf. A006285, A058517, A350628, A350630, A350957, A350958. %K A350629 nonn %O A350629 1,1 %A A350629 _N. J. A. Sloane_, Feb 05 2022