A187313 Half the number of (n+2)X7 binary arrays with each 3X3 subblock having sum 3, 4, 5 or 6

502545, 38586679, 2885253967, 219684364642, 16720419105846, 1272968321737346, 96936541525346279, 7381886136632779297, 562143290050791907402, 42808456214913586706030, 3259959385289599256192062

Offset

1,1

Comments

Column 5 of A187317

Links

R. H. Hardin, Table of n, a(n) for n = 1..74

Example

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

Crossrefs

Sequence in context: A145539 A157759 A227110 * A183789 A203548 A195525

Adjacent sequences: A187310 A187311 A187312 * A187314 A187315 A187316

Keyword

nonn

Author

R. H. Hardin Mar 08 2011

Status

approved