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A235769
Number of (n+1) X (4+1) 0..1 arrays with the sum of each 2 X 2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise.
1
288, 1948, 12417, 70752, 377890, 1874171, 8783904, 38884279, 163704284, 657363226, 2525936111, 9324137986, 33129297593, 113732864597, 377785457375, 1218228779121, 3817997272627, 11661674918706, 34748345374833
OFFSET
1,1
COMMENTS
Column 4 of A235772.
FORMULA
Empirical recurrence of order 88 (see link above).
EXAMPLE
Some solutions for n=4
..0..0..1..0..1....0..0..1..0..0....1..0..0..1..0....0..1..0..0..0
..1..1..0..0..0....1..1..0..1..0....0..1..0..0..0....1..0..1..0..1
..1..1..0..0..1....0..1..0..0..1....1..1..0..0..0....1..0..1..1..0
..1..0..1..1..0....1..1..1..1..1....1..0..1..1..1....0..1..0..1..1
..1..1..0..1..1....0..1..0..1..0....1..1..1..0..0....1..1..0..0..1
CROSSREFS
Cf. A235772.
Sequence in context: A296784 A235078 A235072 * A049230 A322677 A235552
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2014
STATUS
approved