A186061 Number of (n+2)X9 binary arrays with each 3X3 subblock having a positive determinant

60588, 1206478, 19416799, 275207345, 4584860256, 72905263923, 1130708781343, 18130539910403, 287526402899408, 4535336921964336, 72099241003949754, 1142655253137546939, 18084010448517161871, 286883699606121628553

Offset

1,1

Comments

Column 7 of A186063

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 4X9
..0..1..0..0..1..0..1..0..1....0..1..0..0..1..1..0..1..0
..0..1..1..0..1..1..0..1..0....0..1..1..0..0..1..1..0..1
..1..0..1..1..0..1..0..0..1....1..1..1..1..0..0..1..1..0
..0..1..0..1..1..0..1..1..0....0..1..0..0..1..0..0..1..1

Crossrefs

Sequence in context: A218488 A257754 A234767 * A237305 A251826 A237461

Adjacent sequences: A186058 A186059 A186060 * A186062 A186063 A186064

Keyword

nonn

Author

R. H. Hardin Feb 11 2011

Status

approved