A011787 - OEIS

%I #8 Mar 30 2012 17:26:41

%S 1,48,43008,660602880,167761422581760,692647993190048071680,

%T 46119672943810238272430407680,49327181820263339694887026906732953600,

%U 845779385319367513935228608424336170436211507200

%N Number of n X n matrices over Z_4 whose determinant is 1.

%F a(n) = A065128(n)/2

%K nonn

%O 1,2

%A benlove(AT)preston.polaristel.net (Benjamin T. Love)

%E More terms from _Max Alekseyev_, Jan 22 2012