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Sum of the entries in the character table of the group GL(2,Z_n).
1

%I #4 Jul 14 2020 23:49:07

%S 1,5,24,52,120,120,336,496,654,600,1320,1248,2184,1680,2880

%N Sum of the entries in the character table of the group GL(2,Z_n).

%F For an odd prime p : a(p) = p*(p^2-1).

%Y Cf. A000252, A062354, A053191.

%K mult,nonn,more

%O 1,2

%A Yuval Dekel (dekelyuval(AT)hotmail.com), Jul 11 2003