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 A302438 #23 Jun 09 2018 09:05:07
%S A302438 11,22,33,44,55,66,77,88,99,112,123,134,145,156,167,178,189,224,235,
%T A302438 246,257,268,279,336,347,358,369,448,459,1111,1113,1122,1124,1133,
%U A302438 1135,1144,1146,1155,1157,1166,1168,1177,1179,1188,1199,1223,1225,1234,1236,1245,1247
%N A302438 Numbers with digits in nondecreasing order and even digital sum (in base 10) whose digits can be partitioned in two multisets with equal digital sum.
%H A302438 David A. Corneth, <a href="/A302438/b302438.txt">Table of n, a(n) for n = 1..11671</a>
%H A302438 David A. Corneth, <a href="/A302438/a302438_1.gp.txt">PARI prog</a>
%e A302438 a(5000) = 11222699 is in this sequence as it has digits in nondecreasing order and an even digital sum, which is 32. The digits can be partitioned in two multisets with equal sum, for example as {1, 6, 9} and {1, 2, 2, 2, 9}, each having sum 16.
%o A302438 (PARI) \\ See PARI link.
%Y A302438 Cf. A009994, A054683.
%K A302438 nonn,easy,base
%O A302438 1,1
%A A302438 _David A. Corneth_, Apr 08 2018