A283679 G.f.: F(F(F(x))) where F(x) = x/(1-x-x^2) is the g.f. for the Fibonacci numbers.

0, 1, 3, 12, 48, 197, 815, 3391, 14153, 59185, 247791, 1038186, 4351706, 18245861, 76514483, 320899470, 1345931153, 5645394769, 23679726926, 99326654214, 416638208001, 1747652017025, 7330817809523, 30750407615699, 128988186902345, 541064919671773, 2269598571509748, 9520261251293028

Offset

0,3

Links

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

Maple

f:= x-> x/(1-x-x^2):
a:= n-> coeff(series(f(f(f(x))), x, n+1), x, n):
seq(a(n), n=0..23);

Crossrefs

Sequence in context: A113956 A323261 A103943 * A165328 A351282 A142873

Adjacent sequences: A283676 A283677 A283678 * A283680 A283681 A283682

Keyword

nonn,easy

Author

Oboifeng Dira, Mar 14 2017

Extensions

Edited by N. J. A. Sloane, Apr 21 2017

Status

approved