A071310 - OEIS

%I #14 Jul 11 2024 22:23:30

%S 1,32,4608,7077888,101921587200,19725496300339200,

%T 49628717475771816345600

%N a(n) = (1/4) * (number of n X n 0..11 matrices with MM' mod 12 = I).

%F a(n) = A071302(n) * A071303(n). - _Max Alekseyev_, Nov 06 2022

%Y Cf. A003053, A071302, A071303, A071304, A071305, A071306, A071307, A071308, A071309, A071900.

%K nonn,more

%O 1,2

%A _R. H. Hardin_, Jun 11 2002

%E a(6) from _Max Alekseyev_, Nov 06 2022

%E a(7) from _Sean A. Irvine_, Jul 11 2024