login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A206128 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors 9
50, 170, 170, 558, 798, 558, 1906, 3692, 3692, 1906, 6386, 18572, 25340, 18572, 6386, 21940, 93582, 201498, 201498, 93582, 21940, 74714, 491162, 1622095, 2501248, 1622095, 491162, 74714, 258496, 2591052, 13475116, 31537842, 31537842, 13475116 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.....50......170.......558........1906..........6386...........21940

....170......798......3692.......18572.........93582..........491162

....558.....3692.....25340......201498.......1622095........13475116

...1906....18572....201498.....2501248......31537842.......404927788

...6386....93582...1622095....31537842.....619611200.....12251680342

..21940...491162..13475116...404927788...12251680342....372768662926

..74714..2591052.112183711..5199505646..242348711498..11329725297298

.258496.13911368.939358762.66968651436.4795824388008.344897509718070

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..220

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

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

CROSSREFS

Sequence in context: A160783 A085445 A048511 * A333101 A206121 A349808

Adjacent sequences:  A206125 A206126 A206127 * A206129 A206130 A206131

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 04 2012

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 2 21:48 EDT 2022. Contains 355029 sequences. (Running on oeis4.)