OFFSET
1,2
COMMENTS
Table starts
...1......2.........4............8............16.............32.............64
...2......8........32..........128...........512...........2048...........8192
...4.....32.......253.........1970.........15109.........114302.........854473
...8....128......1970........28952........407498........5524088.......72544970
..16....512.....15109.......407498......10142461......235950302.....5190742489
..32...2048....114302......5524088.....235950302.....9107867048...323797652462
..64...8192....854473.....72544970....5190742489...323797652462.18095156337973
.128..32768...6323090....927723512..109049720858.10764286026008
.256.131072..46390429..11603925098.2205335209381
.512.524288.337896422.142479782648
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..96
R. P. Anstee, Properties of (0,1)-matrices with no triangles, J. Combin. Theory Ser. A 29 (1980), no. 2, 186--198.
H. J. Ryser, Combinatorial configurations, SIAM J. Appl. Math. 17 1969 593--602.
EXAMPLE
Some solutions for n=4 k=4
..0..1..1..0....1..0..1..1....0..1..0..0....1..0..1..0....1..0..0..0
..1..1..0..0....1..0..1..0....1..0..1..1....0..0..0..1....0..1..1..0
..0..1..0..0....1..1..0..0....1..0..0..1....1..0..1..0....1..0..1..1
..0..1..1..0....0..1..0..0....1..0..1..1....1..0..1..1....1..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin and N. J. A. Sloane, Jun 10 2012
STATUS
approved