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A067989 Row sums of triangle A067979; also of triangle A067990. 2
1, 9, 34, 95, 240, 553, 1212, 2547, 5195, 10340, 20184, 38766, 73451, 137565, 255080, 468877, 855288, 1549583, 2790510, 4997895, 8907481, 15804634, 27928464, 49169100, 86268325, 150882993, 263124862 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..26.

FORMULA

a(n)= (n+2)*((3*n+1)*F(n-1)/2+(2*n+1)*F(n)), with F(n) := A000045(n) (Fibonacci).

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

CROSSREFS

Sequence in context: A014816 A147691 A000441 * A002881 A268803 A250652

Adjacent sequences:  A067986 A067987 A067988 * A067990 A067991 A067992

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Feb 15 2002

STATUS

approved

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Last modified September 21 02:11 EDT 2018. Contains 315247 sequences. (Running on oeis4.)