A186825 T(n,k)=Half the number of (n+2)X(k+2) binary arrays with each 3X3 subblock having sum 4 or 5

126, 606, 606, 2904, 3988, 2904, 14229, 25808, 25808, 14229, 70767, 173121, 222632, 173121, 70767, 351549, 1190637, 2009622, 2009622, 1190637, 351549, 1750896, 8178097, 18829218, 24581099, 18829218, 8178097, 1750896, 8730234, 56422648

Offset

1,1

Comments

Table starts

.......126.........606..........2904...........14229.............70767

.......606........3988.........25808..........173121...........1190637

......2904.......25808........222632.........2009622..........18829218

.....14229......173121.......2009622........24581099.........315843055

.....70767.....1190637......18829218.......315843055........5634207241

....351549.....8178097.....175882357......4037185979.......99751773733

...1750896....56422648....1653336285.....52016332522.....1783799078413

...8730234...390661554...15639380661....676967599202....32322581577916

..43522407..2704080467..147826932337...8797063846281...584495537657334

.217032372.18732156320.1399067559974.114525000303377.10594536209194545

Links

R. H. Hardin, Table of n, a(n) for n = 1..111

Example

Some solutions for 5X4 with a(1,1)=0
..0..1..1..1....0..1..0..0....0..1..0..1....0..1..0..1....0..0..0..1
..0..0..1..0....1..0..1..1....0..0..1..0....1..0..0..0....0..0..1..1
..0..0..1..0....1..0..0..1....1..1..0..1....0..1..1..0....1..1..1..0
..1..1..1..0....0..1..1..0....0..1..1..0....1..1..0..1....0..0..0..1
..0..1..0..0....0..0..1..0....0..0..1..0....1..0..0..1....1..1..0..1

Crossrefs

Sequence in context: A245992 A267566 A165023 * A186817 A107658 A181254

Adjacent sequences: A186822 A186823 A186824 * A186826 A186827 A186828

Keyword

nonn,tabl

Author

R. H. Hardin Feb 27 2011

Status

approved