A235781 Number of (n+1)X(3+1) 0..2 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

3199, 86691, 1998795, 41559689, 807571787, 14878043073, 263391351981, 4508888392477, 75130028343785, 1222874406744241, 19515692813220075, 306085217228732839, 4728915176920700761, 72089433981418124645

Offset

1,1

Comments

Column 3 of A235784

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A306197 A211840 A235786 * A235562 A269114 A035896

Adjacent sequences: A235778 A235779 A235780 * A235782 A235783 A235784

Keyword

nonn

Author

R. H. Hardin, Jan 15 2014

Status

approved