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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 (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

.-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: A141011 A090359 A049308 * A343446 A205671 A234294

Adjacent sequences: A227052 A227053 A227054 * A227056 A227057 A227058

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 30 2013

STATUS

approved

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Last modified November 29 13:01 EST 2022. Contains 358429 sequences. (Running on oeis4.)