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A222896 T(n,k)=Number of nXk 0..2 arrays with successive rows and columns fitting to straight lines with strictly increasing slope, with a single point array taken as having zero slope 2
3, 0, 0, 0, 31, 0, 0, 51, 51, 0, 0, 40, 621, 40, 0, 0, 12, 2542, 2542, 12, 0, 0, 0, 2646, 230803, 2646, 0, 0, 0, 0, 0, 3219925, 3219925, 0, 0, 0, 0, 0, 0, 44680819, 129912903, 44680819, 0, 0, 0, 0, 0, 0, 341380271, 6314798902, 6314798902, 341380271, 0, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.3..0....0.........0..........0..........0............0..........0.0.0.0

.0.31...51........40.........12..........0............0..........0.0.0

.0.51..621......2542.......2646..........0............0..........0.0

.0.40.2542....230803....3219925...44680819....341380271.2205404653

.0.12.2646...3219925..129912903.6314798902.116002906380

.0..0....0..44680819.6314798902

.0..0....0.341380271

.0..0....0

.0..0

.0

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

EXAMPLE

Some solutions for n=4 k=4

..2..0..1..0....2..1..0..0....2..1..0..0....1..1..0..0....1..1..1..0

..0..2..2..0....1..0..0..0....2..0..1..0....2..0..0..2....1..0..2..0

..1..0..2..1....0..1..0..1....1..1..1..1....1..0..1..1....0..1..1..2

..0..0..2..1....0..1..1..1....0..2..2..2....0..1..0..2....0..1..2..2

CROSSREFS

Sequence in context: A228861 A057382 A007270 * A057387 A109898 A223074

Adjacent sequences:  A222893 A222894 A222895 * A222897 A222898 A222899

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 08 2013

STATUS

approved

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Last modified July 8 19:20 EDT 2020. Contains 335524 sequences. (Running on oeis4.)