A086782 Sum of the degrees of the irreducible representations of the group GL(3,Z_n).
1, 28, 468, 1876, 12400, 13104, 100548
Offset: 1
Formula
For a prime p : a(p) = phi(p^3)*(p^3 - 1) = p^2*(p-1)^2*(p^2+p+1)
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