login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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

R. H. Hardin, Table of n, a(n) for n = 1..97

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: A275530 A180637 A201539 * A161332 A217547 A285583

Adjacent sequences:  A223744 A223745 A223746 * A223748 A223749 A223750

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 27 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 31 10:42 EDT 2020. Contains 334748 sequences. (Running on oeis4.)