a(n) = 10*a(n-1) - 5*a(n-2), with a(0)=0, a(1)=1.

A190987

a(n) = 10*a(n-1) - 5*a(n-2), with a(0)=0, a(1)=1.

Terms

    a(0) =0a(1) =1a(2) =10a(3) =95a(4) =900a(5) =8525a(6) =80750a(7) =764875a(8) =7245000a(9) =68625625a(10) =650031250a(11) =6157184375a(12) =58321687500a(13) =552430953125

External references