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A107588 G.f. satisfies: A(x) = 1 + ( x/A(x) )/A( x/A(x) ). 0
1, 1, -2, 8, -42, 258, -1764, 13070, -103262, 860812, -7516306, 68380986, -645635800, 6307334042, -63602862362, 660771763808, -7061440267362, 77524521343282, -873398761544252, 10087973928531918, -119358929179189278, 1445596845096459108, -17909930113246116338 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..22.

FORMULA

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

PROG

(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)}

CROSSREFS

Cf. A088714.

Sequence in context: A235350 A100327 A018934 * A013999 A130649 A054993

Adjacent sequences:  A107585 A107586 A107587 * A107589 A107590 A107591

KEYWORD

sign

AUTHOR

Paul D. Hanna, May 17 2005

STATUS

approved

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Last modified November 12 14:35 EST 2019. Contains 329058 sequences. (Running on oeis4.)