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A086633
Row sums of triangle A086632.
1
1, 2, 6, 28, 159, 984, 6406, 43222, 299631, 2121721, 15282329, 111621879, 824812768, 6154988092, 46318172220, 351105380284, 2678473144801, 20548178604408, 158424726746707
OFFSET
0,2
FORMULA
G.f.: A(x) = (1-2x)/(1-x)^3 + x*A(x)^3.
EXAMPLE
a(1)=1+1=2, a(2)=0+3+3=6, a(3)=-2+3+15+12=28, a(4)=-5-5+30+84+55=159.
CROSSREFS
Cf. A086632 (table).
Sequence in context: A326928 A277381 A184695 * A354311 A201950 A358265
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jul 24 2003
STATUS
approved