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A060934 Second column of Lucas bisection triangle (even part). 3
1, 17, 80, 303, 1039, 3364, 10493, 31885, 95032, 279051, 809771, 2327372, 6636025, 18794633, 52925984, 148303719, 413768263, 1150029940, 3185625077, 8797726981, 24230897416, 66574108227 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Numerator of g.f. is row polynomial sum(A061186(2,m)*x^m,m=0..3).

LINKS

Table of n, a(n) for n=0..21.

É. Czabarka, R. Flórez, L. Junes, A Discrete Convolution on the Generalized Hosoya Triangle, Journal of Integer Sequences, 18 (2015), #15.1.6.

FORMULA

a(n) = A060923(n+1, 1).

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

CROSSREFS

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

Sequence in context: A142021 A172045 A338549 * A228602 A100688 A044204

Adjacent sequences:  A060931 A060932 A060933 * A060935 A060936 A060937

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Apr 20 2001

STATUS

approved

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Last modified January 23 03:52 EST 2021. Contains 340384 sequences. (Running on oeis4.)