G.f. A(x) satisfies A(x) = ( (1 + x*A(x))/(1 - x*A(x)^2) )^2.
A379251
G.f. A(x) satisfies A(x) = ( (1 + x*A(x))/(1 - x*A(x)^2) )^2.
Terms
- a(0) =1a(1) =4a(2) =32a(3) =340a(4) =4144a(5) =54724a(6) =761712a(7) =11004500a(8) =163453472a(9) =2480507524a(10) =38292849280a(11) =599455647828
External references
- oeis: A379251