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A184207 T(n,k)=Number of (n+1)X(k+1) binary arrays with no 2X2 subblock containing fewer than two 1s 8
11, 35, 35, 108, 195, 108, 337, 1028, 1028, 337, 1049, 5529, 8969, 5529, 1049, 3268, 29593, 80812, 80812, 29593, 3268, 10179, 158648, 721939, 1232795, 721939, 158648, 10179, 31707, 850155, 6468501, 18588589, 18588589, 6468501, 850155, 31707, 98764 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.....11........35.........108............337.............1049

.....35.......195........1028...........5529............29593

....108......1028........8969..........80812...........721939

....337......5529.......80812........1232795.........18588589

...1049.....29593......721939.......18588589........471487297

...3268....158648.....6468501......281420718......12021784217

..10179....850155....57909336.....4255603649.....306055720601

..31707...4556371...518574936....64377477751....7795714368919

..98764..24418812..4643443850...973770904216..198537902186962

.307641.130868377.41579555979.14729764992131.5056537169718019

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..420

EXAMPLE

Some solutions for 4X3

..1..1..1....0..1..0....1..1..1....0..1..1....1..0..1....0..1..0....0..1..0

..0..1..0....1..1..1....0..1..1....0..1..1....1..1..0....0..1..0....1..1..0

..0..1..0....0..1..1....0..1..0....1..1..0....0..1..1....0..1..1....0..1..0

..1..1..1....0..1..0....0..1..1....1..1..1....1..1..0....0..1..0....0..1..1

CROSSREFS

Diagonal is A140314(n+1)

Column 1 is A052550(n+2)

Sequence in context: A041232 A050287 A096762 * A114445 A054475 A029540

Adjacent sequences: A184204 A184205 A184206 * A184208 A184209 A184210

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 10 2011

STATUS

approved

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Last modified November 30 21:57 EST 2022. Contains 358453 sequences. (Running on oeis4.)