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A223751 T(n,k)=Number of nX(k+1) 0..3 arrays with every row least squares fitting to a positive slope straight line and every column least squares fitting to a zero or positive slope straight line, with a single point array taken as having zero slope 7
6, 24, 20, 117, 200, 120, 456, 2826, 4800, 536, 1962, 26980, 330642, 74504, 3378, 7660, 308268, 12302880, 21965901, 1918704, 17362, 31897, 2964940, 604821816, 2762855184, 2810374281, 37050508, 108534, 125240, 31799477, 22711440400 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......6..........24............117.............456.............1962

......20.........200...........2826...........26980...........308268

.....120........4800.........330642........12302880........604821816

.....536.......74504.......21965901......2762855184.....511886372927

....3378.....1918704.....2810374281...1404000132960.1141703959781484

...17362....37050508...252313355237.461069929040798

..108534...946850616.32063498387856

..597935.20113935465

.3721248

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..50

EXAMPLE

Some solutions for n=3 k=4

..0..0..2..0..2....0..0..2..1..0....0..0..0..1..2....1..2..2..1..3

..0..0..0..2..1....2..0..0..2..2....0..0..0..2..3....0..0..0..2..1

..3..1..3..3..3....2..0..3..1..2....2..2..1..3..2....2..3..2..3..3

CROSSREFS

Column 1 is A223045

Sequence in context: A327568 A280589 A298038 * A228745 A049319 A203984

Adjacent sequences:  A223748 A223749 A223750 * A223752 A223753 A223754

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 27 2013

STATUS

approved

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Last modified May 28 03:04 EDT 2020. Contains 334671 sequences. (Running on oeis4.)