A061170 Fourth column of Lucas bisection triangle (even part).

1, 70, 905, 6666, 37580, 181074, 786715, 3176210, 12139859, 44471340, 157483176, 542468100, 1826073525, 6028577566, 19573942365, 62643859374, 197971385860, 618724626390, 1914707164559, 5873145245930

Offset: 0

Author

Wolfdieter Lang, Apr 20 2001

Keywords

• nonn
• easy

Comments

Numerator of g.f. is row polynomial Sum_{m=0..6} A061186(4,m)*x^m.

Links

• Matthew House, Table of n, a(n) for n = 0..2354
• Index entries for linear recurrences with constant coefficients, signature (12,-58,144,-195,144,-58,12,-1).

Crossrefs

Cf. A002878(n) = A060923(n, 0).

Cf. A060934, A061169.

Formula

a(n) = A060923(n+3, 3).

G.f.: (1+58*x+123*x^2-278*x^3+193*x^4-72*x^5+16*x^6)/(1-3*x+x^2)^4.