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A223747 T(n,k)=Number of nXk 0..2 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope 5
3, 3, 3, 9, 3, 9, 9, 9, 9, 9, 39, 9, 81, 9, 39, 43, 39, 81, 81, 39, 43, 195, 43, 1521, 81, 1521, 43, 195, 243, 195, 1849, 1521, 1521, 1849, 195, 243, 1209, 243, 38025, 1849, 144495, 1849, 38025, 243, 1209, 1539, 1209, 59049, 38025, 162583, 162583, 38025, 59049 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
.....3.....3........9.......9.........39.......43.........195......243
.....3.....3........9.......9.........39.......43.........195......243
.....9.....9.......81......81.......1521.....1849.......38025....59049
.....9.....9.......81......81.......1521.....1849.......38025....59049
....39....39.....1521....1521.....144495...162583....21793395.30730023
....43....43.....1849....1849.....162583...169219....22836827.28688507
...195...195....38025...38025...21793395.22836827.26606105175
...243...243....59049...59049...30730023.28688507
..1209..1209..1461681.1461681.6934356117
..1539..1539..2368521.2368521
..8007..8007.64112049
.10557.10557
LINKS
EXAMPLE
Some solutions for n=3 k=4
..0..0..0..0....1..0..0..1....0..0..0..0....2..2..2..2....2..2..2..2
..1..1..1..1....0..2..2..0....1..2..2..1....2..1..1..2....2..0..0..2
..0..0..0..0....1..0..0..1....0..0..0..0....2..2..2..2....2..2..2..2
CROSSREFS
Column 2 equals column 1 and column 4 equals column 3
Sequence in context: A180637 A362376 A201539 * A161332 A217547 A285583
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Mar 27 2013
STATUS
approved

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Last modified July 14 22:45 EDT 2024. Contains 374323 sequences. (Running on oeis4.)