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

A004189

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

Terms

    a(0) =0a(1) =1a(2) =10a(3) =99a(4) =980a(5) =9701a(6) =96030a(7) =950599a(8) =9409960a(9) =93149001a(10) =922080050a(11) =9127651499a(12) =90354434940a(13) =894416697901

External references