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A064843
a(n) = A064842(n)/2.
2
0, 1, 3, 9, 18, 33, 53, 81, 116, 161, 215, 281, 358, 449, 553, 673, 808, 961, 1131, 1321, 1530, 1761, 2013, 2289, 2588, 2913, 3263, 3641, 4046, 4481, 4945, 5441, 5968, 6529, 7123, 7753, 8418, 9121, 9861, 10641, 11460, 12321, 13223, 14169
OFFSET
1,3
COMMENTS
Partial sums of A084265. - N. J. A. Sloane, Jul 20 2008
FORMULA
G.f.: -x^2*(-1+x^3-2*x^2) / ( (1+x)*(x-1)^4 ). - R. J. Mathar, Nov 26 2012
CROSSREFS
Sequence in context: A330010 A194114 A127759 * A093446 A256524 A210970
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Oct 25 2001
STATUS
approved