A107094 G.f. A(x) = (1+x)*G(x) = G(G(x)) where G(x) = g.f. of A067145.

0, 1, 2, 0, 2, -10, 56, -350, 2390, -17544, 136846, -1124794, 9681832, -86864206, 809349770, -7808871616, 77836952362, -800020218314, 8465353891808, -92095165316342, 1028910894313302, -11793279016419864, 138555915579090830, -1667276484211383794, 20533971488794963168

Offset

1,3

Links

Table of n, a(n) for n=1..25.

Formula

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

Crossrefs

Cf. A067145.

Sequence in context: A038020 A211910 A250406 * A122496 A335756 A230813

Adjacent sequences: A107091 A107092 A107093 * A107095 A107096 A107097

Keyword

eigen,sign

Author

Paul D. Hanna, May 12 2005

Status

approved