A083870 - OEIS

%I #3 Mar 30 2012 18:50:35

%S 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 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 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 Number of pairs (x,y) of palindromes such that n-th decimal palindrome = x*y and 1<=x<=y.

%e A002113(132)=3333 = 1*3333 = 3*1111 = 11*303 = 33*101, therefore

%e a(132)=4.

%Y Cf. A083867, A038548, A002113.

%K nonn,base

%O 1,4

%A _Reinhard Zumkeller_, May 07 2003