A073525 Result of applying the transformation on generating functions A -> 1/((1-x)*(1-x*A)) to the g.f. for A024718.

1, 2, 5, 15, 51, 187, 716, 2811, 11204, 45089, 182636, 743180, 3034361, 12420945, 50946169, 209296302, 860941813, 3545265139, 14611979639, 60268977054, 248744871983, 1027188978686, 4243751316106, 17539851091965, 72519657462805, 299930389183429, 1240806275485094

Offset

0,2

Comments

Equivalently, result of applying same transformation 4 times to g.f. for Catalan numbers A000108.

Links

Table of n, a(n) for n=0..26.

Formula

G.f.: -(4*t-1+(-4*t+1)^(1/2))/(6*t^2-5*t+(-4*t+1)^(1/2)*t+1-(-4*t+1)^(1/2)).

Crossrefs

Cf. A000108, A014137, A024718.

Sequence in context: A007581 A124303 A367414 * A369481 A366096 A007317

Adjacent sequences: A073522 A073523 A073524 * A073526 A073527 A073528

Keyword

nonn

Author

N. J. A. Sloane, Aug 30 2002

Status

approved