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 A349831 #17 Jan 08 2022 15:40:02 %S A349831 0,2,10,12,14,16,22,24,26,28,34,36,38,40,44,50,58,60,62,66,68,70,72, %T A349831 74,76,82,84,92,94,96,98,106,108,110,114,118,120,122,126,132,134,136, %U A349831 140,146,154,156,158,162,164,170,174,176,178,186,188,190,196,198,202,204,206,210,214,216,218,222 %N A349831 Even numbers in the intersection of A228082 and A349829. %C A349831 Even numbers that are "generated" (in Kaprekar's sense) in both bases 2 and 4. %Y A349831 Cf. A003052, A228082, A349829, A349830, A349832. %Y A349831 A230624 is a subsequence. %Y A349831 A row of A350601. %K A349831 nonn,base %O A349831 1,2 %A A349831 _N. J. A. Sloane_, Jan 07 2022