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A227055
Number of n X n -2..2 arrays of 2X2 subblock diagonal sums minus antidiagonal sums for some (n+1)X(n+1) binary array with rows and columns of the latter in lexicographically nondecreasing order
0
4, 40, 643, 24511, 2625106, 836488605, 818230288186, 2513135860300832
OFFSET
1,1
COMMENTS
Diagonal of A227060
EXAMPLE
Some solutions for n=3
..1..0.-1....0..0..1....0..1..0....0..1.-2....1.-2..1....0..0..1....0..0..1
..0..0..0....1..0.-2....1.-1..0....0..0..1....0..1.-2....1..0.-1....0..1.-2
.-1..0.-1...-1..0..0...-1..0..0....0.-1..0....0..0..0...-1..0..0....0.-1..0
CROSSREFS
Sequence in context: A365587 A090359 A049308 * A343446 A205671 A234294
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 30 2013
STATUS
approved