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A184188 Half the number of (n+1)X(n+1) binary arrays with no 2X2 subblock containing exactly one 1 1
6, 104, 5074, 723635, 294738261, 345350598641, 1159953545419800, 11179084602659460821, 309007688117388883362756, 24500703075201459753727015848, 5572033834554753242178727061445289 (list; graph; refs; listen; history; text; internal format)
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 * A112822 A033589 A077289

Adjacent sequences:  A184185 A184186 A184187 * A184189 A184190 A184191

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 10 2011

STATUS

approved

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Last modified June 14 05:10 EDT 2021. Contains 345018 sequences. (Running on oeis4.)