%I

%S 1,6,179,48337

%N Number of subgroups of Chevalley group A_n(2) (the group of nonsingular n X n matrices over GF(2) ).

%Y Cf. A002884.

%K nonn,hard,more

%O 1,2

%A Ahmed Fares (ahmedfares(AT)my-deja.com), Jun 30 2001