G.f.: (1-8*x-sqrt(64*x^2-20*x+1))/(2*x).
A082367
G.f.: (1-8*x-sqrt(64*x^2-20*x+1))/(2*x).
Terms
- a(0) =1a(1) =9a(2) =90a(3) =981a(4) =11430a(5) =140058a(6) =1782900a(7) =23369805a(8) =313426350a(9) =4281280686a(10) =59360821740a(11) =833312907522
External references
- oeis: A082367