A067301 One eighth of fourth column of triangle A067298.

8, 41, 398, 4460, 53720, 677744, 8836832, 118109888, 1609484672, 22276767488, 312305704448, 4425515174912, 63285369657344, 912105965121536, 13235652537933824, 193215065765888000, 2835518953336438784

Offset

0,1

Links

Table of n, a(n) for n=0..16.

Formula

a(n) = A067298(n+3, 3)/8.

G.f.: ((-3+37*x)+(3+15*x-84*x^2)*c(4*x))/(8*x*(1-2*x*c(4*x))^2), with c(x) is g.f. for A000108 (Catalan).

Crossrefs

Cf. A000108, A067298.

Cf. 3*A067300 (third column).

Sequence in context: A280068 A304466 A228480 * A295936 A352397 A204572

Adjacent sequences: A067298 A067299 A067300 * A067302 A067303 A067304

Keyword

nonn,easy

Author

Wolfdieter Lang, Feb 05 2002

Status

approved