A206784 Number of nX7 0..1 arrays avoiding 0 0 1 horizontally and 0 1 1 vertically

54, 2916, 61003, 1165366, 17515482, 248652016, 3210775788, 40009922008, 476334876958, 5542093365196, 62879423961226, 702454161467961, 7727332842269952, 84083787760092394, 905578254568069211

Offset

1,1

Comments

Column 7 of A206785

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..1..0..1..1..1..0..0....1..0..1..1..0..1..0....1..1..1..1..1..1..1
..0..1..0..1..1..0..1....1..0..1..0..1..1..0....0..1..1..1..1..0..1
..0..0..0..0..0..0..0....0..1..0..0..0..0..0....1..1..1..1..1..1..1
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..1..1..1..1..0..1

Crossrefs

Sequence in context: A188849 A188856 A207004 * A188521 A189262 A189700

Adjacent sequences: A206781 A206782 A206783 * A206785 A206786 A206787

Keyword

nonn

Author

R. H. Hardin Feb 12 2012

Status

approved