A186605 Number of (n+4)X9 binary arrays with every 5X5 subblock commuting with each horizontal and vertical neighbor 5X5 subblock

156276, 10882, 19840, 54040, 101080, 126344, 132040, 133484, 134936, 136416, 138160, 141124, 149504, 175064, 237212, 343672, 478073, 619334, 779227, 977188, 1221205, 1496127, 1786289, 2120643, 2555213, 3142299, 3894691, 4803584, 5916562

Offset

1,1

Comments

Column 5 of A186609

Links

R. H. Hardin, Table of n, a(n) for n = 1..90

Formula

Empirical: a(n)=a(n-1)+a(n-3)-a(n-4)+a(n-5)-a(n-6)-a(n-8)+a(n-9)+a(n-10)-a(n-13) for n>19

Example

Some solutions for 6X9
..0..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..1..1
..0..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0..1
..0..0..0..0..0..0..0..0..1....1..1..0..0..0..0..0..0..0
..0..0..1..0..0..0..0..0..0....0..1..0..0..0..0..0..0..0
..1..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0

Crossrefs

Sequence in context: A177811 A341118 A129242 * A297060 A377949 A114658

Adjacent sequences: A186602 A186603 A186604 * A186606 A186607 A186608

Keyword

nonn

Author

R. H. Hardin Feb 24 2011

Status

approved