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 A350957 #15 Mar 07 2022 13:27:50 %S A350957 0,1,2,2,1,2,3,2,1,3,2,1,2,1,2,4,2,0,3,3,1,3,3,1,3,1,1,3,1,1,3,2,0,3, %T A350957 3,1,3,2,0,3,2,2,3,3,1,3,2,0,4,3,1,3,3,1,5,3,1,3,2,0,2,2,0,3,2,1,3,2, %U A350957 1,5,2,0,1,2,1,3,3,0,3,3,0,3,3,1,2,1,1,3,2,1,4,3,0,2,3 %N A350957 Number of ways to write 2*n as 3^i (i >= 0) plus a prime. %F A350957 a(n) = A282432(2*n). - _R. J. Mathar_, Mar 07 2022 %Y A350957 Cf. A006285, A058517, A350628-A350630, A350958, A282432. %K A350957 nonn %O A350957 1,3 %A A350957 _N. J. A. Sloane_, Feb 05 2022