a(n) = 10*a(n-1) - a(n-2) with a(0) = 0, a(1) = 2.

A001078

a(n) = 10*a(n-1) - a(n-2) with a(0) = 0, a(1) = 2.

Terms

    a(0) =0a(1) =2a(2) =20a(3) =198a(4) =1960a(5) =19402a(6) =192060a(7) =1901198a(8) =18819920a(9) =186298002a(10) =1844160100a(11) =18255302998a(12) =180708869880

External references