E.g.f. (1-x -sqrt(1-2*x-3*x^2) )/2.
A052735
E.g.f. (1-x -sqrt(1-2*x-3*x^2) )/2.
Terms
- a(0) =0a(1) =0a(2) =2a(3) =6a(4) =48a(5) =480a(6) =6480a(7) =105840a(8) =2056320a(9) =46085760a(10) =1172102400a(11) =33330528000
External references
- oeis: A052735
A052735
E.g.f. (1-x -sqrt(1-2*x-3*x^2) )/2.