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A183780 Half the number of (n+1)X8 binary arrays with no 2X2 subblock having exactly 2 ones 1
1425, 24001, 344483, 5431499, 82573675, 1284649009, 19815396763, 307446383061, 4760294305144, 73819487702999, 1144141214145647, 17740853191335851, 275047069987337151, 4264758060628986689, 66124561853525742255 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A183782

LINKS

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

EXAMPLE

Some solutions with a(1,1)=0 for 3X8

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

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

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

CROSSREFS

Sequence in context: A225567 A216444 A083428 * A068572 A236897 A163589

Adjacent sequences:  A183777 A183778 A183779 * A183781 A183782 A183783

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 07 2011

STATUS

approved

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Last modified July 23 22:20 EDT 2021. Contains 346265 sequences. (Running on oeis4.)