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 A092213 #4 Jul 11 2015 00:54:49 %S A092213 0,2,3,5,6,9,10,14,15,17,18,21,24,25,27,30,33,34,35,37,42,44,45,51,52, %T A092213 54,57,62,63,65,66,69,75,78,81,84,85,90,93,96,99,101,102,105,108,114, %U A092213 115,119,121,126,129,130,133,135,139,146,149,150,153,155,164,165,166 %N A092213 In base 2: numbers n of the form k + reverse(k) for at least one k. %C A092213 Base-2 analog of A067030 (base 10) and A091678 (base 4). Complement of A092214. %e A092213 25 is a term since 25 (decimal) = 11001 = 10100 + 00101 = 20 (decimal) + 5 (decimal). %Y A092213 Cf. A035522, A092214, A067030, A091678. %K A092213 nonn,base,easy %O A092213 0,2 %A A092213 _Klaus Brockhaus_, Feb 25 2004