A186900 Number of (n+1) X 8 binary arrays with every 2 X 2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock determinants.

5182, 7240, 35270, 171877, 554824, 2920816, 14050512, 85310077, 380380974, 2084921316, 10171396928, 59609066832, 283945023554, 1585035059879, 7796801707520, 44553039814455, 217880630036290, 1215831257195360, 6030041554893802, 33879618151906714, 168192686721168448

Offset

1,1

Links

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

Example

Some solutions for 3 X 8:
..1..1..0..1..1..0..0..0....0..0..1..1..1..0..0..0....0..1..1..0..0..0..1..0
..1..1..0..0..1..1..0..0....0..0..1..1..1..0..1..1....0..0..1..1..1..1..1..1
..0..1..1..0..0..1..0..1....1..1..1..0..1..1..1..0....0..0..0..1..1..1..0..1

Crossrefs

Column 7 of A186902.

Sequence in context: A107344 A184000 A247259 * A186847 A185485 A061050

Adjacent sequences: A186897 A186898 A186899 * A186901 A186902 A186903

Keyword

nonn

Author

R. H. Hardin, Feb 28 2011

Status

approved