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3,3
Note that n divides a(n). For odd n, it appears that a(n)=n(2n^3-15^2+34n-21)/24.
Jon Schoenfield, Table of n, a(n) for n = 3..100
a(n) = A146212(n) - A007569(n).
Sequence in context: A256539 A109363 A218214 * A176145 A270978 A272512
Adjacent sequences: A146210 A146211 A146212 * A146214 A146215 A146216
nonn
T. D. Noe, Oct 28 2008
More terms from Jon E. Schoenfield, Nov 11 2008
approved