A186607 Number of (n+4)X11 binary arrays with every 5X5 subblock commuting with each horizontal and vertical neighbor 5X5 subblock

707955, 38625, 61336, 98376, 132040, 176696, 191232, 193000, 195032, 198284, 206372, 229900, 274644, 326864, 405664, 549188, 715968, 905732, 1152093, 1428286, 1777291, 2173080, 2636597, 3208931, 3889897, 4787199, 5898065, 7266423, 8989959

Offset

1,1

Comments

Column 7 of A186609

Links

R. H. Hardin, Table of n, a(n) for n = 1..65

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>21

Example

Some solutions for 6X11
..1..0..0..0..0..0..0..0..0..1..0....0..0..0..0..0..0..0..0..0..1..0
..0..0..0..0..0..0..0..0..0..1..1....0..0..0..0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..0..1..1
..0..0..0..0..0..0..0..0..0..0..0....1..1..0..0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0..0..0..0....1..1..0..0..0..0..0..0..0..0..0
..0..0..1..1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0..0..0..0

Crossrefs

Sequence in context: A234701 A140943 A134615 * A249195 A236277 A251378

Adjacent sequences: A186604 A186605 A186606 * A186608 A186609 A186610

Keyword

nonn

Author

R. H. Hardin Feb 24 2011

Status

approved