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 A366211 #13 Oct 06 2023 11:02:04 %S A366211 5,19,28,37,46,55,64,73,82,91,155,156,157,158,159,165,175,185,195,255, %T A366211 256,257,258,259,265,275,285,295,355,356,357,358,359,365,375,385,395, %U A366211 455,456,457,458,459,465,475,485,495,505,506,507,508,509,515,516,517,518,519,525 %N A366211 Numbers whose median of the digits is equal to 5. %e A366211 19 is a term since the median of the digits 1 and 9 is (1+9)/2 = 5; %e A366211 155 is a term since the median of the digits 1, 5, and 5 is 5. %t A366211 Select[Range[0,525], Median[IntegerDigits[#]]==5&] %Y A366211 Cf. A292730 (median = 0), A292739 (median = 9), A366207 (median = 1), A366208 (median = 2), A366209 (median = 3), A366210 (median = 4), A366212 (median = 6), A366213 (median = 7), A366214 (median = 8). %K A366211 nonn,base,easy %O A366211 1,1 %A A366211 _Stefano Spezia_, Oct 04 2023