A185532 Number of (n+2) X 9 binary arrays with each 3 X 3 subblock nonsingular.

915702, 30631134, 989438596, 30654215226, 978050637454, 31056846439654, 981555541329694, 31129923319285058, 986788018195669218, 31261059190076491058, 990735792319754562254, 31398037364368755881486

Offset

1,1

Comments

Column 7 of A185534.

Links

R. H. Hardin, Table of n, a(n) for n = 1..38

Example

Some solutions for 4 X 9
..0..0..1..0..0..1..0..1..0....0..0..1..0..0..1..1..1..1
..0..1..0..1..1..0..1..1..0....0..1..1..0..1..0..1..0..0
..1..0..0..1..0..0..1..0..1....1..0..0..1..0..1..0..0..1
..0..0..1..1..1..1..0..1..0....0..0..1..0..0..1..1..1..0

Crossrefs

Cf. A185534.

Sequence in context: A259012 A259005 A256903 * A360907 A321323 A156428

Adjacent sequences: A185529 A185530 A185531 * A185533 A185534 A185535

Keyword

nonn

Author

R. H. Hardin, Jan 30 2011

Status

approved