A186606 Number of (n+4)X10 binary arrays with every 5X5 subblock commuting with each horizontal and vertical neighbor 5X5 subblock

403567, 23977, 44120, 90664, 126344, 169400, 176696, 178372, 180076, 182044, 185232, 193256, 217524, 264552, 338964, 470324, 613816, 815629, 1041906, 1297535, 1613300, 1949221, 2367731, 2857733, 3451499, 4236761, 5185671, 6418983, 7950064

Offset

1,1

Comments

Column 6 of A186609

Links

R. H. Hardin, Table of n, a(n) for n = 1..75

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>20

Example

Some solutions for 6X10
..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..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..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0..0..1
..1..0..1..0..0..0..0..0..0..0....1..1..0..0..0..0..0..0..0..0
..1..1..0..0..0..0..0..0..0..0....1..1..0..0..0..0..0..0..0..0

Crossrefs

Sequence in context: A234056 A157826 A215998 * A227711 A247305 A254025

Adjacent sequences: A186603 A186604 A186605 * A186607 A186608 A186609

Keyword

nonn

Author

R. H. Hardin Feb 24 2011

Status

approved