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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: A365587 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 August 5 15:04 EDT 2024. Contains 374950 sequences. (Running on oeis4.)