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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 07 2011
STATUS
approved

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Last modified June 20 03:21 EDT 2024. Contains 373512 sequences. (Running on oeis4.)