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 A350628 #7 Feb 05 2022 23:37:31 %S A350628 0,0,1,1,1,1,2,2,0,2,2,0,2,1,1,3,2,0,2,3,0,2,3,0,3,1,0,3,1,0,2,2,0,2, %T A350628 3,0,2,2,0,2,2,1,3,3,0,3,2,0,3,3,0,2,3,0,4,3,0,3,2,0,2,2,0,2,2,0,3,2, %U A350628 0,4,2,0,1,2,0,2,3,0,2,3,0,2,3,0,2,1,0,3,2,0,3,3,0,2,3 %N A350628 Number of ways to write 2*n as 3^i (i >= 1) plus a prime. %Y A350628 Cf. A006285, A058517, A350629, A350630, A350957, A350958. %K A350628 nonn %O A350628 1,7 %A A350628 _N. J. A. Sloane_, Feb 05 2022