A186611 Number of (n+5)X6 binary arrays with every 6X6 subblock commuting with each horizontal and vertical neighbor 6X6 subblock

68719476736, 78654, 140552, 654700, 3764191, 15228305, 40150599, 71051374, 92432567, 100362959, 102231008, 103178472, 103876917, 104350491, 104707892, 105211636, 107578107, 118545697, 152992966, 220843564, 312840756, 413705226

Offset

1,1

Comments

Column 1 of A186619

Links

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

Formula

Empirical: a(n)=a(n-1)+a(n-4)-a(n-5)+a(n-6)-a(n-7)-a(n-10)+a(n-11)+a(n-12)-a(n-16) for n>26

Example

Some solutions for 7X6
..1..1..1..0..1..0....1..0..1..0..1..0....1..0..0..0..1..0....1..1..0..0..1..1
..0..1..1..0..1..0....0..1..1..0..0..0....1..0..0..0..1..0....0..1..1..1..1..0
..0..0..1..1..0..0....0..0..0..0..0..0....1..0..0..0..1..0....0..0..1..1..1..1
..0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..0..0..0....0..0..1..1..1..1
..0..0..0..0..0..0....0..0..0..0..0..0....1..0..0..0..1..0....0..0..1..1..1..1
..0..0..0..0..0..0....0..0..0..0..0..0....1..0..0..0..1..0....0..0..1..1..1..1
..0..0..0..1..0..0....0..0..0..1..1..0....1..0..0..0..1..0....0..0..1..1..1..1

Crossrefs

Sequence in context: A344667 A186610 A186619 * A017004 A017076 A017268

Adjacent sequences: A186608 A186609 A186610 * A186612 A186613 A186614

Keyword

nonn

Author

R. H. Hardin Feb 24 2011

Status

approved