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 A036959 #9 Oct 10 2019 04:00:11
%S A036959 2,3,5,7,9,15,19,25,27,33,37,39,45,55,67,79,87,93,97,103,115,117,127,
%T A036959 141,145,157,163,165,171,183,193,195,205,225,229,235,237,247,255,267,
%U A036959 283,285,289,297,303,307,325,327,337,375,381,391,393,403,411,415,423
%N A036959 Primes with digits (0,...,5) taken as base 6 and converted to base 10.
%e A036959 a(n)=303 -> is 1223{6} -> 1223{10} is prime.
%Y A036959 Cf. A036952-A036964.
%K A036959 nonn,base
%O A036959 1,1
%A A036959 _Patrick De Geest_, Jan 04 1999
%E A036959 Offset 1 from _Michel Marcus_, Oct 10 2019