A227055 - OEIS

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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

4, 40, 643, 24511, 2625106, 836488605, 818230288186, 2513135860300832

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Diagonal of A227060

LINKS

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

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