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A085404
Number of n X n matrices over GF(4) with rank n-1.
1
1, 75, 79380, 1310904000, 344319762124800, 1444887697908695040000, 96976611786040182520676352000, 104131021972308383324202529613414400000, 1788970984376098024967914354100894418012733440000
OFFSET
1,2
FORMULA
For n>=2: a(n) = product j=0...n-2 (4^n - 4^j)^2 / (4^(n-1)- 4^j).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Yuval Dekel (dekelyuval(AT)hotmail.com), Jul 31 2003
EXTENSIONS
More terms from David Wasserman, Jan 31 2005
STATUS
approved