a(0) = 0, a(1) = 4; for n > 1, a(n) = 10*a(n-1) - a(n-2).

A122652

a(0) = 0, a(1) = 4; for n > 1, a(n) = 10*a(n-1) - a(n-2).

Terms

    a(0) =0a(1) =4a(2) =40a(3) =396a(4) =3920a(5) =38804a(6) =384120a(7) =3802396a(8) =37639840a(9) =372596004a(10) =3688320200a(11) =36510605996a(12) =361417739760

External references