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 A083870 #3 Mar 30 2012 18:50:35 %S A083870 1,1,1,2,1,2,1,2,2,1,2,2,3,2,4,2,4,3,1,1,2,1,1,1,1,1,1,1,2,1,2,1,3,1, %T A083870 2,1,2,1,2,1,1,2,1,1,3,1,1,2,3,1,2,1,3,1,2,1,5,1,2,1,1,1,1,2,1,1,1,1, %U A083870 4,3,2,2,2,1,4,1,2,2,2,1,1,1,1,1,1,2,1,1,4,1,2,1,3,1,2,1,4,1,3,1,1,2,1,1,2 %N A083870 Number of pairs (x,y) of palindromes such that n-th decimal palindrome = x*y and 1<=x<=y. %e A083870 A002113(132)=3333 = 1*3333 = 3*1111 = 11*303 = 33*101, therefore %e A083870 a(132)=4. %Y A083870 Cf. A083867, A038548, A002113. %K A083870 nonn,base %O A083870 1,4 %A A083870 _Reinhard Zumkeller_, May 07 2003