A235840 Number of (n+1)X(3+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.

2581, 86509, 2919508, 84434218, 2090202044, 44724089619, 849474770590, 14522792725086, 227945075932922, 3310579596663058, 45097735688257706, 578891366979555783, 7068001519607692033, 82341095995180796862

Offset

1,1

Comments

Column 3 of A235842

Links

R. H. Hardin, Table of n, a(n) for n = 1..177

Example

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

Crossrefs

Sequence in context: A252167 A252160 A236425 * A200711 A235950 A260840

Adjacent sequences: A235837 A235838 A235839 * A235841 A235842 A235843

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved