%I A053290
%S A053290 1,2,48,11232,24261120,475566474240,84129611558952960,
%T A053290 134068444202678083338240,1923442429811445711790394572800,
%U A053290 248381049201184165590947520186915225600
%N A053290 Number of nonsingular n X n matrices over GF(3).
%H A053290 J. Overbey, W. Traves and J. Wojdylo, <a href="http://jeff.over.bz/papers/
               undergrad/on-the-keyspace-of-the-hill-cipher.pdf">On the Keyspace 
               of the Hill Cipher</a>
%F A053290 (3^n - 1)(3^n - 3)...(3^n - 3^(n-1))
%Y A053290 Cf. A002884, A053291-A053293.
%Y A053290 Cf. A003787.
%Y A053290 Sequence in context: A067626 A053071 A002820 this_sequence A056989 A090770 
               A081960
%Y A053290 Adjacent sequences: A053287 A053288 A053289 this_sequence A053291 A053292 
               A053293
%K A053290 easy,nonn
%O A053290 0,2
%A A053290 Stephen G. Penrice (spenrice(AT)ets.org), Mar 04 2000
%E A053290 More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 16 2000