A186821 Half the number of (n+2)X7 binary arrays with each 3X3 subblock having sum 4 or 5.

70767, 1190637, 18829218, 315843055, 5634207241, 99751773733, 1783799078413, 32322581577916, 584495537657334, 10594536209194545, 192625016377623752, 3500057158418808686, 63637200466766220870, 1157907423273867982529

Offset

1,1

Comments

Column 5 of A186825

Links

R. H. Hardin, Table of n, a(n) for n = 1..95

Example

Some solutions for 4X7 with a(1,1)=0
..0..0..1..0..0..1..0....0..0..1..0..1..0..0....0..0..1..0..0..0..1
..0..1..0..0..1..0..0....0..1..0..0..1..1..0....0..1..1..1..1..1..0
..0..1..1..0..1..1..0....0..1..1..1..0..1..1....0..1..0..0..1..0..0
..1..0..1..0..0..1..1....1..0..0..1..0..0..0....0..1..0..0..1..0..0

Crossrefs

Sequence in context: A252104 A236016 A204482 * A252728 A226530 A215994

Adjacent sequences: A186818 A186819 A186820 * A186822 A186823 A186824

Keyword

nonn

Author

R. H. Hardin, Feb 27 2011

Status

approved