%I A053291
%S A053291 1,3,180,181440,2961100800,775476766310400,3251791214634074112000,
%T A053291 218210695042457748180566016000,
%U A053291 234298374547168764346587444978647040000
%N A053291 Nonsingular n X n matrices over GF(4).
%F A053291 (4^n - 1)(4^n - 4)...(4^n - 4^(n-1))
%Y A053291 Cf. A002884, A053290, A053292, A053293.
%Y A053291 Cf. A003788.
%Y A053291 Sequence in context: A113270 A091324 A093434 this_sequence A042779 A103503 
               A157561
%Y A053291 Adjacent sequences: A053288 A053289 A053290 this_sequence A053292 A053293 
               A053294
%K A053291 easy,nonn
%O A053291 0,2
%A A053291 Stephen G. Penrice (spenrice(AT)ets.org), Mar 04 2000
%E A053291 More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 16 2000