A184611 Half the number of (n+1)X7 binary arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one

4450, 188394, 8066003, 371916790, 16993352260, 771907128421, 35064902406734, 1594748121566704, 72514675650594381, 3297087935683084588, 149910835479169325612, 6816235030869007049219, 309923223283746790099222

Offset

1,1

Comments

Column 6 of A184614

Links

R. H. Hardin, Table of n, a(n) for n = 1..165

Example

Some solutions for 3X7
..0..0..0..0..1..1..1....0..0..1..0..0..0..1....0..0..1..0..0..0..1
..0..1..1..1..0..1..1....0..1..0..1..0..1..0....1..0..1..1..1..1..0
..0..1..0..0..1..1..0....0..1..0..1..0..1..1....0..1..1..1..0..1..0
...
...1..2..2..2..3..4.......1..2..2..1..1..2.......1..2..3..2..2..2...
...2..3..2..2..3..3.......2..2..2..2..2..3.......2..3..4..3..3..2...

Crossrefs

Sequence in context: A102622 A280485 A236906 * A279042 A253697 A253704

Adjacent sequences: A184608 A184609 A184610 * A184612 A184613 A184614

Keyword

nonn

Author

R. H. Hardin Jan 18 2011

Status

approved