A144692 G.f.: A(x) = x/Series_Reversion[x*G(x)] where A(x*G(x)) = G(x) = g.f. of A144691.

1, 1, 1, 0, 17, 0, 408, 0, 69473, 0, 6018928, 0, 1363916728, 0, 219434809664, 0, 184186824259233, 0, 57411426894898072, 0, 38606038922780709192, 0, 16136153318586799828504, 0, 20401945614919621585224136, 0, 12864310266687158415460633528, 0

Offset

0,5

Comments

Do the zeros continue to appear every other term?

Links

Table of n, a(n) for n=0..27.

Example

G.f.: A(x) = 1 + x + x^2 + 17*x^4 + 408*x^6 + 69473*x^8 + 6018928*x^10 +...
satisfies: A(x*G(x)) = G(x) = g.f. of A144691 where
G(x) = 1 + x + 2*x^2 + 4*x^3 + 26*x^4 + 106*x^5 + 816*x^6 + 4292*x^7 +...

Crossrefs

Cf. A144691.

Sequence in context: A338801 A198631 A185685 * A335264 A241027 A176728

Adjacent sequences: A144689 A144690 A144691 * A144693 A144694 A144695

Keyword

nonn

Author

Paul D. Hanna, Oct 10 2008

Extensions

a(14) corrected and a(16)-a(23) added by Max Alekseyev, May 03 2011

a(24)-a(27) from Max Alekseyev, Dec 19 2011

Status

approved