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A088389
Number of real regular n X n (0,1) matrices modulo rows permutations.
4
1, 1, 3, 29, 940, 104286, 40050850, 53640013886, 251995529844792
OFFSET
0,3
LINKS
Antony Pearson, On Hidden Structures in Contaminated Symbolic Data, Ph. D. thesis, University of Colorado at Boulder (2020) 27835343.
FORMULA
a(n) = A055165(n) / n!.
CROSSREFS
Sequence in context: A117264 A256043 A065072 * A270883 A094000 A162085
KEYWORD
nonn,hard,more
AUTHOR
Yuval Dekel (dekelyuval(AT)hotmail.com), Nov 08 2003
EXTENSIONS
a(8) from Herman Jamke (hermanjamke(AT)fastmail.fm), Feb 24 2008
a(0)=1 prepended by Alois P. Heinz, Jun 18 2022
STATUS
approved