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 A366210 #12 Oct 06 2023 11:01:56 %S A366210 4,17,26,35,44,53,62,71,80,144,145,146,147,148,149,154,164,174,184, %T A366210 194,244,245,246,247,248,249,254,264,274,284,294,344,345,346,347,348, %U A366210 349,354,364,374,384,394,404,405,406,407,408,409,414,415,416,417,418,419,424,425 %N A366210 Numbers whose median of the digits is equal to 4. %e A366210 17 is a term since the median of the digits 1 and 7 is (1+7)/2 = 4; %e A366210 144 is a term since the median of the digits 1, 4, and 4 is 4. %t A366210 Select[Range[0,425], Median[IntegerDigits[#]]==4&] %Y A366210 Cf. A292730 (median = 0), A292739 (median = 9), A366207 (median = 1), A366208 (median = 2), A366209 (median = 3), A366211 (median = 5), A366212 (median = 6), A366213 (median = 7), A366214 (median = 8). %K A366210 nonn,base,easy %O A366210 1,1 %A A366210 _Stefano Spezia_, Oct 04 2023