A184188 Half the number of (n+1)X(n+1) binary arrays with no 2X2 subblock containing exactly one 1

6, 104, 5074, 723635, 294738261, 345350598641, 1159953545419800, 11179084602659460821, 309007688117388883362756, 24500703075201459753727015848, 5572033834554753242178727061445289

Offset

1,1

Comments

Diagonal of A184197

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

Some solutions for 3X3
..1..0..1....1..0..1....1..0..1....0..1..0....0..1..0....1..0..0....1..0..0
..1..1..1....0..1..1....1..1..1....1..1..1....1..0..1....0..1..1....0..1..1
..1..1..1....1..0..0....0..0..0....0..1..1....1..1..1....0..1..0....1..1..1

Crossrefs

Sequence in context: A006768 A055969 A285027 * A356008 A112822 A033589

Adjacent sequences: A184185 A184186 A184187 * A184189 A184190 A184191

Keyword

nonn

Author

R. H. Hardin Jan 10 2011

Status

approved