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 A118867 #8 Mar 23 2023 10:58:31
%S A118867 15,37,46,47,64,71,83,84,90,102,106,107,116,120,122,135,149,154,168,
%T A118867 173,179,180,181,185,193,195,198,200,210,222,224,229,232,239,242,248,
%U A118867 265,289,299,304,310,327,330,332,333,347,356,364,367,369,375,383,402,407
%N A118867 Numbers n such that 2^n, 3^n and 5^n have even digit sum.
%e A118867 {2^15,3^15,5^15}={32768,14348907,30517578125} with even digit sum {26,36,44}.
%t A118867 Select[Range[500],AllTrue[Total/@(IntegerDigits/@{2^#,3^#,5^#}),EvenQ]&] (* _Harvey P. Dale_, Mar 23 2023 *)
%o A118867 (PARI) isok(n) = !(sumdigits(2^n) % 2) && !(sumdigits(3^n) % 2) && !(sumdigits(5^n) % 2); \\ _Michel Marcus_, Oct 10 2013
%Y A118867 Subsequence of A118734.
%K A118867 base,nonn
%O A118867 1,1
%A A118867 _Zak Seidov_, May 24 2006