A107588 G.f. satisfies: A(x) = 1 + ( x/A(x) )/A( x/A(x) ).

1, 1, -2, 8, -42, 258, -1764, 13070, -103262, 860812, -7516306, 68380986, -645635800, 6307334042, -63602862362, 660771763808, -7061440267362, 77524521343282, -873398761544252, 10087973928531918, -119358929179189278, 1445596845096459108, -17909930113246116338

Offset: 0

Author

Paul D. Hanna, May 17 2005

Keywords

• sign

Crossrefs

Cf. A088714.

Programs

PARI

{a(n)=local(A=1+x+x*O(x^n)); for(k=1,n,A=1+subst(x/A,x,x/A));polcoeff(A,n)}

Formula

G.f.: A(x) = 1/G088714(-x), where G088714(x) is the g.f. of A088714.