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A006383
Number of equivalence classes of n X n binary matrices when one can permute rows, permute columns and complement columns.
(Formerly M2701)
6
1, 1, 3, 7, 41, 299, 6128, 343656, 67013431, 45770163273, 108577103160005, 886929528971819040, 24943191706060101926577, 2425246700258693990625775794, 820270898724825121532156178527106
OFFSET
0,3
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..50 (terms 0..35 from Sean A. Irvine)
M. A. Harrison, On the number of classes of binary matrices, IEEE Trans. Computers, 22 (1973), 1048-1051.
M. A. Harrison, On the number of classes of binary matrices, IEEE Transactions on Computers, C-22.12 (1973), 1048-1052. (Annotated scanned copy)
EXAMPLE
a(2) = 3:
00 10 11
00 00 00
CROSSREFS
Main diagonal of A363349.
Sequence in context: A018968 A018969 A018971 * A181148 A179907 A080581
KEYWORD
nonn,nice,easy
EXTENSIONS
Definition corrected by Brendan McKay, Jan 07 2007
Terms a(7) onward from Max Alekseyev, Feb 05 2010
STATUS
approved