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A203609 Number of nX7 0,1 arrays with adjacent row and column sums unequal 0
2, 900, 149794, 20742920, 2608783126, 310153746516, 35610018145138, 3993667091848452 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A203610

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A229678 A261528 A265881 * A265617 A324597 A159723

Adjacent sequences:  A203606 A203607 A203608 * A203610 A203611 A203612

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2012

STATUS

approved

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Last modified January 22 18:37 EST 2022. Contains 350488 sequences. (Running on oeis4.)