A186617 Number of (n+5)X12 binary arrays with every 6X6 subblock commuting with each horizontal and vertical neighbor 6X6 subblock

40150599, 955892, 1360475, 2676699, 4710363, 6009659, 6820667, 6908987, 6919495, 6930031, 6940831, 6954355, 6980043, 7071847, 7512023, 8708687, 10602303, 13875155, 19034059, 24347399, 31701828, 39823281, 48652486, 58874451, 71008156

Offset

1,1

Comments

Column 7 of A186619

Links

R. H. Hardin, Table of n, a(n) for n = 1..36

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>24

Example

Some solutions for 7X12
..0..0..0..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..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..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..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..0..0..0..0..1
..0..0..1..0..0..0..0..0..0..0..0..0....0..1..0..1..0..0..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

Crossrefs

Sequence in context: A181727 A307477 A218390 * A186960 A186571 A186572

Adjacent sequences: A186614 A186615 A186616 * A186618 A186619 A186620

Keyword

nonn

Author

R. H. Hardin Feb 24 2011

Status

approved