login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A186902 T(n,k)=Number of (n+1)X(k+1) binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants 9
0, 30, 30, 76, 148, 76, 234, 140, 140, 234, 632, 406, 444, 406, 632, 1832, 1246, 1692, 1692, 1246, 1832, 5182, 3106, 3948, 5401, 3948, 3106, 5182, 14860, 7240, 13894, 14437, 14437, 13894, 7240, 14860, 42346, 19040, 35270, 49303, 39372, 49303, 35270 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

......0.....30......76.....234......632......1832.......5182.......14860

.....30....148.....140.....406.....1246......3106.......7240.......19040

.....76....140.....444....1692.....3948.....13894......35270......122820

....234....406....1692....5401....14437.....49303.....171877......608194

....632...1246....3948...14437....39372....158437.....554824.....2203303

...1832...3106...13894...49303...158437....703983....2920816....12599670

...5182...7240...35270..171877...554824...2920816...14050512....85310077

..14860..19040..122820..608194..2203303..12599670...85310077...523902288

..42346..49004..328174.1974583..7843906..53255787..380380974..2795274149

.121016.124974.1091770.6828851.30466049.237167117.2084921316.16608468926

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..312

EXAMPLE

Some solutions for 4X3

..0..1..1....1..1..0....0..1..1....1..1..0....0..0..0....0..0..1....0..1..0

..1..1..0....0..1..1....1..1..0....0..1..1....0..1..1....1..1..1....1..1..1

..0..0..0....0..0..0....1..1..0....0..0..1....1..1..0....1..1..0....1..0..1

..1..0..0....0..1..1....0..1..1....1..0..1....0..1..1....0..1..1....1..0..1

CROSSREFS

Column 1 is A185479

Sequence in context: A220440 A040871 A022364 * A185487 A051723 A247517

Adjacent sequences:  A186899 A186900 A186901 * A186903 A186904 A186905

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 28 2011

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 August 19 18:51 EDT 2019. Contains 326133 sequences. (Running on oeis4.)