

A250981


Number of (n+1)X(7+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements


1



17673153, 55847243498, 174911850250602, 548891857207523016, 1722239421934657361988, 5403961231550447362641701, 16956293118548007574241097692, 53204663067980474498805483728765
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OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

Some solutions for n=1
..0..0..1..1..2..2..2..0....0..0..0..0..2..1..0..1....0..0..0..0..0..1..2..1
..0..0..1..1..1..0..0..0....0..0..1..2..0..2..2..2....0..0..1..1..2..1..2..1


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



