A206318 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero

112, 873, 873, 6831, 14990, 6831, 53463, 258452, 258452, 53463, 418468, 4466450, 9841886, 4466450, 418468, 3275406, 77132181, 375274347, 375274347, 77132181, 3275406, 25637095, 1332632711, 14309749540, 31585648103, 14309749540

Offset

1,1

Comments

Table starts

.......112..........873............6831...............53463

.......873........14990..........258452.............4466450

......6831.......258452.........9841886...........375274347

.....53463......4466450.......375274347.........31585648103

....418468.....77132181.....14309749540.......2656145209648

...3275406...1332632711....545678293613.....223458785606871

..25637095..23019152735..20808377921080...18792437854613234

.200665376.397663246671.793485464714845.1580709874695673480

Links

R. H. Hardin, Table of n, a(n) for n = 1..144

Example

Some solutions for n=4 k=3
..2..0..2..3....0..1..0..1....0..1..3..3....3..0..1..1....0..1..2..3
..0..1..0..1....1..0..3..3....1..3..1..0....1..1..3..2....1..3..1..2
..2..2..1..3....3..2..1..0....3..2..0..1....3..2..0..3....3..0..2..3
..0..3..2..0....0..3..2..1....2..0..3..3....2..3..1..0....1..1..0..2
..1..0..3..1....1..0..3..2....1..2..1..0....1..1..0..1....0..2..1..3

Crossrefs

Sequence in context: A203796 A203789 A211448 * A206311 A343372 A330418

Adjacent sequences: A206315 A206316 A206317 * A206319 A206320 A206321

Keyword

nonn,tabl

Author

R. H. Hardin Feb 06 2012

Status

approved