A014168 Apply partial sum operator twice to binary rooted tree numbers.

1, 3, 7, 14, 26, 47, 84, 149, 264, 468, 831, 1479, 2637, 4709, 8420, 15069, 26987, 48356, 86677, 155408, 278694, 499851, 896594, 1608353, 2885280, 5176183, 9286284, 16660260, 29890069, 53626053, 96211592, 172615925, 309696044, 555637311, 996891328, 1788564939

Offset

1,2

Links

Table of n, a(n) for n=1..36.

Index entries for sequences related to rooted trees

Index entries for sequences related to trees

Formula

G.f.: (B(x)-x)/x(1-x)^2 where B(x) is g.f. of A002572.

Crossrefs

Cf. A002572. Partial sums of A014167, not of A173404.

Sequence in context: A079921 A369115 A293767 * A132109 A317779 A099854

Adjacent sequences: A014165 A014166 A014167 * A014169 A014170 A014171

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved