G.f. A(x) satisfies: [x^(m+2)] A(F^m(x)) = 0 for m>0 where F^m(x) denotes the m-th iteration of F(x) = x+x^2 with F^0(x)=x.
A187119
G.f. A(x) satisfies: [x^(m+2)] A(F^m(x)) = 0 for m>0 where F^m(x) denotes the m-th iteration of F(x) = x+x^2 with F^0(x)=x.
Terms
- a(0) =1a(1) =-2a(2) =4a(3) =-12a(4) =36a(5) =-140a(6) =519a(7) =-2632a(8) =11776a(9) =-82020a(10) =426990a(11) =-4149112a(12) =22719260a(13) =-309921456a(14) =1487214652a(15) =-31477804596a(16) =82495148888
External references
- oeis: A187119