A061174 Fifth column of Lucas bisection triangle (odd part).

15, 545, 7043, 57560, 365045, 1970905, 9520315, 42385132, 177293730, 705980760, 2701362950, 10001654350, 36020160943, 126701700755, 436709397085, 1478813477920, 4930328078835, 16212542696607

Offset: 0

Author

Wolfdieter Lang, Apr 20 2001

Keywords

• nonn
• easy

Comments

Numerator of g.f. is row polynomial sum(A061187(4,m)*x^m,m=0..7).

Crossrefs

Cf. A002548, 2*A061171, A061172, 4*A061173.

Formula

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

G.f.: (3-2*x)*(16*x^6-56*x^5+181*x^4-306*x^3+171*x^2+110*x+5)/(1-3*x+x^2)^5.