a(1) = 9; a(n) = smallest multiple of a(n-1) which is a palindromic square.

A069501

a(1) = 9; a(n) = smallest multiple of a(n-1) which is a palindromic square.

Terms

    a(0) =9a(1) =12321a(2) =102030201a(3) =12345654321

External references