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 A055960 #10 Aug 08 2024 07:25:05
%S A055960 0,2,4,6,8,10,12,14,16,18,20,12,24,36,48,60,72,84,96,108,120,132,24,
%T A055960 36,48,60,72,84,96,108,120,132,144,36,48,60,72,84,96,108,120,132,144,
%U A055960 156,48,60,72,84,96,108,120,132,144,156,168,60,72,84,96,108,120,132,144
%N A055960 n + reversal of base 11 digits of n (written in base 10).
%C A055960 If n has an even number of digits in base 11 then a(n) is a multiple of 12.
%F A055960 a(n) = n + A056960(n).
%t A055960 Table[n+IntegerReverse[n,11],{n,0,70}] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Aug 30 2016 *)
%Y A055960 Cf. A056960, A056964.
%K A055960 base,nonn
%O A055960 0,2
%A A055960 _Henry Bottomley_, Jul 18 2000