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 A355274 #6 Jul 04 2022 14:07:02
%S A355274 0,2,6,8,9,11,15,17,18,19,20,21,23,24,25,26,27,29,33,35,45,47,51,53,
%T A355274 54,55,56,57,59,60,61,62,63,65,69,71,72,73,74,75,77,78,79,80,81,82,83,
%U A355274 84,86,87,88,89,90,92,96,98,99,100,101,102,104,105,106,107,108,110,114,116
%N A355274 Numbers having more even than odd digits when written in base 3.
%o A355274 (PARI) select( {is_A355274(n)=vecsum(n=digits(n,3)%2)*2<#n+!n}, [0..123])
%o A355274 (Python)
%o A355274 from sympy.ntheory import digits
%o A355274 def ok(n):
%o A355274 d = digits(n, 3)[1:]
%o A355274 return len(d) < 2*sum(1 for di in d if di%2 == 0)
%o A355274 print([k for k in range(117) if ok(k)]) # _Michael S. Branicky_, Jul 03 2022
%Y A355274 Cf. A072603 (same in base 2), A352546 (same in base 10).
%K A355274 nonn,base
%O A355274 1,2
%A A355274 _M. F. Hasler_, Jul 03 2022