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 A276144 #11 Aug 27 2016 09:50:45 %S A276144 1,1,1,1,1,1,1,1,1,7777,77077,122221,707707,770077,7070707,7700077, %T A276144 4444444,88888888,70077007,70700707,77000077,88888888,88888888, %U A276144 888808888,488888884,700707007,707000707,404444404,770000077,440444044,444040444,848888848,884888488 %N A276144 Solutions y to x/SOD(x) = y, where x and y are palindromes. %C A276144 "SOD" = "sum of digits" (A007953). %H A276144 Lars Blomberg, <a href="/A276144/b276144.txt">Table of n, a(n) for n = 1..10000</a> %H A276144 C. Rivera, PrimePuzzles.Net, <a href="http://www.primepuzzles.net/puzzles/puzz_041.htm">Puzzle 41.- Palindromic Carnival</a>, section B. %e A276144 279972/SOD(279972) = 279972/36 = 7777, so 7777 is a term. %Y A276144 See A276142 for the x values. %Y A276144 See A276143 for the SOD(x) values. %Y A276144 Cf. A002113, A005349, A007953. %K A276144 nonn,base %O A276144 1,10 %A A276144 _Lars Blomberg_, Aug 22 2016