a(n) = 10*a(n-1) + 5*a(n-2), with a(0)=0, a(1)=1.
A190955
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) =105a(4) =1100a(5) =11525a(6) =120750a(7) =1265125a(8) =13255000a(9) =138875625a(10) =1455031250a(11) =15244690625a(12) =159722062500
External references
- oeis: A190955