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A061173 One-fourth of fourth column of Lucas bisection triangle (odd part). 3
3, 70, 642, 4055, 20945, 95372, 398290, 1561683, 5836190, 21001410, 73300478, 249476600, 831342517, 2720979140, 8768966810, 27881856697, 87610794135, 272424413508, 839229287580, 2563768831145, 7773145679478 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

Numerator of g.f. is row polynomial sum(A061187(3,m)*x^m,m=0..5)/4.

FORMULA

a(n)=A060924(n+3, 3)/4.

G.f.: (x+1)*(3-2*x)*(1+11*x-11*x^2+4*x^3)/(1-3*x+x^2)^4.

CROSSREFS

Cf. A005248, 2*A061171, A061172.

Sequence in context: A012074 A037109 A132793 * A156598 A082942 A000282

Adjacent sequences:  A061170 A061171 A061172 * A061174 A061175 A061176

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Apr 20 2001

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Last modified February 14 14:47 EST 2012. Contains 205623 sequences.