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 A118070 #10 Sep 24 2024 11:20:42 %S A118070 0,2,4,6,8,10,12,14,16,18,21,23,25,27,29,30,32,34,36,38,41,43,45,47, %T A118070 49,50,52,54,56,58,61,63,65,67,69,70,72,74,76,78,81,83,85,87,89,90,92, %U A118070 94,96,98,101,103,105,107,109,110,112,114,116,118,121,123,125,127,129,130 %N A118070 Numbers with exactly one even decimal digit. %t A118070 Select[Range[0,130],Length[Select[IntegerDigits[#],EvenQ]]==1&] (* _James C. McMahon_, Sep 24 2024 *) %Y A118070 Cf. A085585 (squares with exactly one odd decimal digit). %K A118070 base,nonn %O A118070 1,2 %A A118070 _Zak Seidov_, May 11 2006