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A236516
Number of (n+1)X(n+1) 0..1 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise
0
16, 264, 9212, 655460, 99655626, 31459840764, 21144229954815, 29928295205526111, 90406983382500912004
OFFSET
1,1
COMMENTS
Diagonal of A236523
EXAMPLE
Some solutions for n=3
..1..1..1..1....0..1..1..0....1..0..0..0....1..1..0..0....0..1..1..1
..0..0..0..1....1..0..0..1....1..1..1..1....1..0..1..1....0..0..1..0
..0..0..0..0....0..0..0..0....0..1..0..1....0..0..0..1....1..0..1..1
..0..0..1..0....0..1..0..1....0..0..0..1....0..0..1..1....0..0..0..1
CROSSREFS
Sequence in context: A240633 A068770 A113359 * A187453 A333903 A218062
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 27 2014
STATUS
approved