OFFSET
1,1
LINKS
Index entries for linear recurrences with constant coefficients, signature (5, -10, 10, -5, 1).
FORMULA
G.f.: 4*x*(9+151*x+199*x^2+25*x^3)/(1-x)^5 [From Maksym Voznyy (voznyy(AT)mail.ru), Aug 11 2009]
a(1)=36, a(2)=784, a(3)=4356, a(4)=14400, a(5)=36100, a(n)=5*a(n-1)- 10*a(n-2)+ 10*a(n-3)-5*a(n-4)+a(n-5) [From Harvey P. Dale, May 11 2012]
MATHEMATICA
Take[Table[n(2n-1), {n, 60}], {2, -1, 2}]^2 (* or *) LinearRecurrence[ {5, -10, 10, -5, 1}, {36, 784, 4356, 14400, 36100}, 30](* Harvey P. Dale, May 11 2012 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
G.f. proposed by Maksym Voznyy checked and corrected by R. J. Mathar, Sep 16 2009.
More terms from Erich Friedman.
STATUS
approved