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 A341010 #13 Feb 22 2021 06:45:03 %S A341010 9,90,117,128,135,146,153,164,171,182,218,281,315,333,348,351,366,384, %T A341010 416,438,461,483,513,531,568,586,614,636,641,658,663,685,711,788,812, %U A341010 821,834,843,856,865,878,887,900,1017,1028,1035,1046,1053,1064,1071,1082,1107,1129,1170 %N A341010 Numbers whose sum of even digits and sum of odd digits differ by 9. %H A341010 Carole Dubois, <a href="/A341010/b341010.txt">Table of n, a(n) for n = 1..5001</a> %t A341010 Select[Range[1200], Abs[Plus @@ Select[(d = IntegerDigits[#]), OddQ] - Plus @@ Select[d, EvenQ]] == 9 &] (* _Amiram Eldar_, Feb 02 2021 *) %Y A341010 Cf. A036301 (sums are equal), A341002 to A341010 (sums differ by 1 to 9). %K A341010 base,nonn %O A341010 1,1 %A A341010 _Eric Angelini_ and _Carole Dubois_, Feb 02 2021