Let x(n) = 123...n, y(n) = n...321; a(n) = y(n) concatenated with x(n) - x(n) concatenated with y(n).

A083827

Let x(n) = 123...n, y(n) = n...321; a(n) = y(n) concatenated with x(n) - x(n) concatenated with y(n).

Terms

    a(0) =0a(1) =891a(2) =197802a(3) =30866913a(4) =4197558024a(5) =530864469135

External references