a(2*n+2) = 10*a(2*n+1), a(2*n+1) = 10*a(2*n) - 9^n*A000108(n), a(0) = 1.
A156577
a(2*n+2) = 10*a(2*n+1), a(2*n+1) = 10*a(2*n) - 9^n*A000108(n), a(0) = 1.
Terms
- a(0) =1a(1) =9a(2) =90a(3) =891a(4) =8910a(5) =88938a(6) =889380a(7) =8890155a(8) =88901550a(9) =888923646a(10) =8889236460a(11) =88889884542a(12) =888898845420
External references
- oeis: A156577