A227055 - OEIS

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

%I #5 Dec 18 2015 18:18:36

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

%N 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

%C Diagonal of A227060

%e Some solutions for n=3

%e ..1..0.-1....0..0..1....0..1..0....0..1.-2....1.-2..1....0..0..1....0..0..1

%e ..0..0..0....1..0.-2....1.-1..0....0..0..1....0..1.-2....1..0.-1....0..1.-2

%e .-1..0.-1...-1..0..0...-1..0..0....0.-1..0....0..0..0...-1..0..0....0.-1..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 30 2013