G.f.: (1-x + sqrt(1 - 14*x + x^2)) / (2*(1 - 14*x + x^2)).
A245923
G.f.: (1-x + sqrt(1 - 14*x + x^2)) / (2*(1 - 14*x + x^2)).
Terms
- a(0) =1a(1) =10a(2) =127a(3) =1684a(4) =22717a(5) =309214a(6) =4231675a(7) =58117672a(8) =800173945a(9) =11037041074a(10) =152448280183
External references
- oeis: A245923