a(1) = 9, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

A088780

a(1) = 9, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

Terms

    a(0) =9a(1) =99a(2) =9009a(3) =909909a(4) =9009009009

External references