A181274 T(n,k)=Number of nXk binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly decreasing order

2, 4, 0, 8, 3, 0, 16, 11, 0, 0, 32, 48, 9, 0, 0, 64, 188, 79, 0, 0, 0, 128, 768, 766, 58, 0, 0, 0, 256, 3056, 6060, 1629, 13, 0, 0, 0, 512, 12288, 49928, 28924, 1991, 3, 0, 0, 0, 1024, 49088, 395024, 507052, 87873, 1420, 0, 0, 0, 0, 2048, 196608, 3170784, 8211776

Offset

1,1

Comments

Table starts

.2.4..8.16...32.....64.......128........256.........512.........1024

.0.3.11.48..188....768......3056......12288.......49088.......196608

.0.0..9.79..766...6060.....49928.....395024.....3170784.....25244608

.0.0..0.58.1629..28924....507052....8211776...133693904...2140571200

.0.0..0.13.1991..87873...3409059..115127924..3829185508.123796928928

.0.0..0..3.1420.177193..15691171.1126220822.76961864884.............

.0.0..0..0..592.233363..50841045.7892201343.........................

.0.0..0..0..120.205181.118451006....................................

.0.0..0..0...11.123441..............................................

.0.0..0..0....0.....................................................

Links

R. H. Hardin, Table of n, a(n) for n=1..108

Crossrefs

Sequence in context: A208745 A137511 A011166 * A115341 A368609 A101160

Adjacent sequences: A181271 A181272 A181273 * A181275 A181276 A181277

Keyword

nonn,tabl

Author

R. H. Hardin Oct 10 2010

Status

approved