a(n) = Sum_{i=0..n-1} i*10^i - Sum_{i=0..n-1} (n-1-i)*10^i.

A338226

a(n) = Sum_{i=0..n-1} i*10^i - Sum_{i=0..n-1} (n-1-i)*10^i.

Terms

    a(0) =0a(1) =9a(2) =198a(3) =3087a(4) =41976a(5) =530865a(6) =6419754a(7) =75308643a(8) =864197532a(9) =9753086421a(10) =108641975310

External references