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 A082273 #6 Oct 25 2019 20:16:47 %S A082273 2,3,4,5,6,7,8,9,11,11,22,111,22,22,22,22,22,22,22,22,22,33,111,33,33, %T A082273 33,33,33,33,33,33,33,44,111,44,44,44,44,44,44,44,44,44,55,111,55,55, %U A082273 55,55,55,55,55,55,55,66,111,66,66,66,66,66,66,66,66,66,77,111,77,77 %N A082273 Palindromes arising in A082272. %F A082273 a(n) = A082272(n) + n. %e A082273 a(11) = 22, 11 + 11 = 22; a(12) = 111, 99 + 12 = 111; etc. %Y A082273 Cf. A082272, A084843. %K A082273 nonn,base %O A082273 1,1 %A A082273 _Amarnath Murthy_, Apr 13 2003 %E A082273 Edited by _Patrick De Geest_, Jun 08 2003