A183259 Number of nX4 binary arrays with the number of 0-1 adjacencies equal to the number of 0-0 adjacencies

3, 22, 157, 1899, 23285, 284314, 3534109, 44666147, 568723429, 7296845360, 94115102881, 1219598072719, 15862582371441, 206984139821242, 2708176662889977, 35518310665734877, 466794647103979156

Offset

1,1

Comments

Column 4 of A183262

Links

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

Example

Some solutions for 4X4
..0..0..1..1....0..1..0..0....0..0..0..0....0..0..0..0....1..0..0..0
..0..0..1..1....0..0..0..1....1..0..1..0....1..1..0..0....1..0..1..0
..0..0..1..1....1..1..0..0....0..0..0..1....0..1..0..0....0..0..1..1
..0..1..0..1....1..0..0..0....0..0..1..1....1..0..0..1....0..0..0..1

Crossrefs

Sequence in context: A037782 A041661 A037586 * A218668 A164021 A192365

Adjacent sequences: A183256 A183257 A183258 * A183260 A183261 A183262

Keyword

nonn

Author

R. H. Hardin Jan 03 2011

Status

approved