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Table of n, a(n) for n=1..30.
n/15 * (2n^4 + 5n^3 + 20n^2 + 25 + 23).
Sequence in context: A030506 A062990 A018213 * A000649 A027173 A286973
Adjacent sequences: A047658 A047659 A047660 * A047662 A047663 A047664
N. J. A. Sloane.