a(1) = 2, a(n) = smallest palindromic nontrivial multiple of a(n-1) containing all decimal digits of a(n-1).

A342232

a(1) = 2, a(n) = smallest palindromic nontrivial multiple of a(n-1) containing all decimal digits of a(n-1).

Terms

    a(0) =2a(1) =22a(2) =242a(3) =24442a(4) =4204024a(5) =42044444024

External references