A186063 T(n,k)=Number of (n+2)X(k+2) binary arrays with each 3X3 subblock having a positive determinant

87, 267, 267, 792, 1217, 792, 2328, 5050, 5050, 2328, 6915, 18376, 26868, 18376, 6915, 20475, 77987, 128303, 128303, 77987, 20475, 60588, 319247, 743667, 836891, 743667, 319247, 60588, 179442, 1206478, 3894282, 5877960, 5877960, 3894282, 1206478

Offset

1,1

Comments

Table starts

......87......267........792........2328..........6915...........20475

.....267.....1217.......5050.......18376.........77987..........319247

.....792.....5050......26868......128303........743667.........3894282

....2328....18376.....128303......836891.......5877960........40407070

....6915....77987.....743667.....5877960......58408337.......545528022

...20475...319247....3894282....40407070.....545528022......6541274560

...60588..1206478...19416799...275207345....4584860256.....72905263923

..179442..5004260..109272739..1895454019...44097747372....948612706087

..531306.20446314..574576902.13007169394..410464949409..11378633159391

.1573062.78510506.2902540637.89136850704.3514156302617.128977165646242

Links

R. H. Hardin, Table of n, a(n) for n = 1..263

Example

Some solutions for 5X4
..0..1..0..1....1..0..0..1....1..1..0..0....1..0..0..1....1..1..1..1
..0..1..1..0....0..1..0..1....0..1..1..0....1..1..0..1....1..0..1..1
..1..0..1..0....1..0..1..1....1..0..0..1....0..1..1..0....1..1..0..1
..1..0..0..1....1..0..0..1....1..1..0..0....0..0..1..1....0..1..0..0
..0..1..0..0....1..1..1..1....1..1..1..0....1..1..0..1....0..0..1..1

Crossrefs

Sequence in context: A020314 A008899 A008879 * A186055 A243580 A219723

Adjacent sequences: A186060 A186061 A186062 * A186064 A186065 A186066

Keyword

nonn,tabl

Author

R. H. Hardin Feb 11 2011

Status

approved