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A192736 Right edge of the triangle in A033291. 3
1, 4, 12, 28, 50, 84, 133, 192, 270, 370, 484, 624, 793, 980, 1200, 1456, 1734, 2052, 2413, 2800, 3234, 3718, 4232, 4800, 5425, 6084, 6804, 7588, 8410, 9300, 10261, 11264, 12342, 13498, 14700, 15984, 17353, 18772, 20280, 21880, 23534, 25284, 27133, 29040 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A007980(n-1) * n.

LINKS

Table of n, a(n) for n=1..44.

Index entries for linear recurrences with constant coefficients, signature (2,-1,2,-4,2,-1,2,-1).

FORMULA

G.f.: x*(2*x^5+2*x^4+6*x^3+5*x^2+2*x+1) / ((x-1)^4*(x^2+x+1)^2). - Colin Barker, Mar 31 2013

PROG

(Haskell) See A033291.

CROSSREFS

Cf. A192735.

Sequence in context: A301005 A178571 A278211 * A109629 A112087 A166019

Adjacent sequences:  A192733 A192734 A192735 * A192737 A192738 A192739

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jul 08 2011

STATUS

approved

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Last modified January 17 22:51 EST 2019. Contains 319251 sequences. (Running on oeis4.)