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A061178 Third column (m=2) of triangle A060920 (bisection of Fibonacci triangle, even part). 2
1, 9, 51, 233, 942, 3522, 12473, 42447, 140109, 451441, 1426380, 4434420, 13599505, 41225349, 123723351, 368080793, 1086665562, 3186317718, 9286256393, 26916587307, 77634928209, 222920650081 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Numerator polynomial of g.f. is sum(A061176(3,m)*x^m,m=0..3).

LINKS

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

FORMULA

a(n)= A060920(n+2, 2).

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

CROSSREFS

A001519, A054444.

Sequence in context: A054549 A005746 A220236 * A246178 A213164 A278135

Adjacent sequences:  A061175 A061176 A061177 * A061179 A061180 A061181

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Apr 20 2001

STATUS

approved

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Last modified December 10 10:38 EST 2018. Contains 318047 sequences. (Running on oeis4.)