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

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

Offset

0,3

Links

Table of n, a(n) for n=0..8.

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

Cf. A055165, A053601.

Sequence in context: A117264 A256043 A065072 * A270883 A094000 A162085

Adjacent sequences: A088386 A088387 A088388 * A088390 A088391 A088392

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