a(n) = (1/162)*(61*10^n + 18*n + 20).

A155859

a(n) = (1/162)*(61*10^n + 18*n + 20).

Terms

    a(0) =4a(1) =38a(2) =377a(3) =3766a(4) =37655a(5) =376544a(6) =3765433a(7) =37654322a(8) =376543211a(9) =3765432100a(10) =37654320989a(11) =376543209878

External references