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 A055950 #13 Aug 07 2024 15:35:54
%S A055950 0,2,4,6,8,6,12,18,24,30,12,18,24,30,36,18,24,30,36,42,24,30,36,42,48,
%T A055950 26,52,78,104,130,36,62,88,114,140,46,72,98,124,150,56,82,108,134,160,
%U A055950 66,92,118,144,170,52,78,104,130,156,62,88,114,140,166,72,98,124,150
%N A055950 a(n) = n + reversal of base 5 digits of n (written in base 10).
%C A055950 If n has an even number of digits in base 5 then a(n) is a multiple of 6.
%H A055950 Seiichi Manyama, <a href="/A055950/b055950.txt">Table of n, a(n) for n = 0..10000</a>
%F A055950 a(n) = n + A030104(n).
%t A055950 Table[n + IntegerReverse[n, 5], {n, 0, 100}] (* _Paolo Xausa_, Aug 07 2024 *)
%Y A055950 Cf. A030104, A056964.
%K A055950 base,nonn,look
%O A055950 0,2
%A A055950 _Henry Bottomley_, Jul 18 2000