A088389 Number of real regular n X n (0,1) matrices modulo rows permutations.

1, 1, 3, 29, 940, 104286, 40050850, 53640013886, 251995529844792

Offset: 0

Author

Yuval Dekel (dekelyuval(AT)hotmail.com), Nov 08 2003

Keywords

• nonn
• hard
• more

Links

• Antony Pearson, On Hidden Structures in Contaminated Symbolic Data, Ph. D. thesis, University of Colorado at Boulder (2020) 27835343.

Crossrefs

Cf. A055165, A053601.

Formula

a(n) = A055165(n) / n!.

Extensions

a(8) from Herman Jamke (hermanjamke(AT)fastmail.fm), Feb 24 2008

a(0)=1 prepended by Alois P. Heinz, Jun 18 2022