A185795 Number of (n+1)X7 binary arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum

1716, 3456, 7888, 24392, 61676, 175588, 441004, 1379208, 3532152, 10752096, 27566736, 87374372, 225433740, 709275680, 1833687964, 5872284748, 15224916988, 48703456708, 126499375072, 407817168640, 1061259571028, 3422366531456

Offset

1,1

Comments

Column 6 of A185798

Links

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

Example

Some solutions for 3X7
..0..0..0..1..0..0..1....0..0..0..0..1..0..1....0..1..0..0..0..0..0
..0..1..1..1..0..1..0....1..0..0..1..0..0..1....0..1..1..0..0..1..1
..1..0..1..1..1..0..0....1..0..1..0..0..0..0....1..1..1..1..0..1..0

Crossrefs

Sequence in context: A267201 A024408 A267741 * A260474 A222343 A318628

Adjacent sequences: A185792 A185793 A185794 * A185796 A185797 A185798

Keyword

nonn

Author

R. H. Hardin Feb 04 2011

Status

approved