

A235561


Number of (n+1)X(2+1) 0..2 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise


1



537, 8345, 113391, 1383617, 15633605, 165947729, 1680360507, 16368643767, 154629524369, 1423864504941, 12838948846501, 113734761931057, 992623171694623, 8553532264219381, 72908918920145825, 615658688491607859
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OFFSET

1,1


COMMENTS



LINKS



FORMULA

Empirical recurrence of order 67 (see link above)


EXAMPLE

Some solutions for n=3
..1..1..0....0..2..0....2..1..0....1..1..0....0..0..2....1..0..1....0..1..1
..1..1..1....0..0..0....1..0..1....0..2..2....0..1..2....2..1..0....2..1..0
..2..1..2....1..2..1....0..2..1....1..2..0....1..1..2....2..2..0....1..1..2
..0..0..2....1..2..1....0..2..0....2..1..1....0..2..0....1..1..2....2..2..1


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



