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 A119894 #9 Nov 05 2023 09:01:47 %S A119894 64,90,106,168,181,185,229,242,369,407,447,470,481,503,552,568,583, %T A119894 612,648,657,683,684,742,758,804,811,852,863,896,915,924,928,1000, %U A119894 1004,1068,1103,1113,1126,1182,1402,1410,1412,1420,1428,1473,1483,1484,1546,1566 %N A119894 Numbers k such that 2^k, 3^k, 5^k, 7^k and 11^k have even digit sum. %t A119894 edsQ[n_]:=And@@EvenQ[Total[IntegerDigits[#]]&/@(Prime[Range[5]]^n)]; Select[Range[1600],edsQ] (* _Harvey P. Dale_, Apr 21 2011 *) %Y A119894 Cf. A054683, A118734, A118867, A119895, A119896, A119897. %K A119894 base,nonn %O A119894 1,1 %A A119894 _Zak Seidov_, May 26 2006