A185521 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock singular

31, 143, 143, 593, 1489, 593, 2553, 12361, 12361, 2553, 10847, 115979, 154561, 115979, 10847, 46303, 1058503, 2490449, 2490449, 1058503, 46303, 197329, 9856209, 35659489, 80761059, 35659489, 9856209, 197329, 841449, 91539073, 541370505

Offset

1,1

Comments

Table starts

.......31.........143............593..............2553................10847

......143........1489..........12361............115979..............1058503

......593.......12361.........154561...........2490449.............35659489

.....2553......115979........2490449..........80761059...........2183297449

....10847.....1058503.......35659489........2183297449..........96865190255

....46303.....9856209......541370505.......65652458491........5157904182519

...197329....91539073.....7998109489.....1894624012417......249246507105681

...841449...853020411...119752453041....56140705014995....12721664424927033

..3587359..7948563615..1781802607473..1649002255383641...630667351622299519

.15295151.74110312433.26592505725449.48754926946880491.31779395697846344999

Links

R. H. Hardin, Table of n, a(n) for n = 1..199

Example

Some solutions for 4X3
..2..1..0....0..2..1....2..0..1....0..0..0....2..0..2....1..0..1....2..0..2
..0..0..0....0..0..0....1..0..0....0..0..0....0..0..2....0..0..1....2..0..0
..2..0..1....0..0..0....1..0..0....1..0..2....0..0..1....1..0..2....0..0..1
..1..0..0....0..0..1....1..0..0....0..0..2....1..0..0....1..0..0....0..0..0

Crossrefs

Sequence in context: A201960 A182916 A233303 * A228261 A185513 A234122

Adjacent sequences: A185518 A185519 A185520 * A185522 A185523 A185524

Keyword

nonn,tabl

Author

R. H. Hardin Jan 29 2011

Status

approved