A236425 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 columnwise and nonincreasing rowwise

2581, 60193, 1290539, 24143945, 414682711, 6480932348, 94263772244, 1278900927369, 16379992931866, 198820398501064, 2304672961745261, 25596758706053645, 273909225712661149, 2831115529220189307

Offset

1,1

Comments

Column 3 of A236427

Links

R. H. Hardin, Table of n, a(n) for n = 1..184

Example

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

Crossrefs

Sequence in context: A252159 A252167 A252160 * A235840 A200711 A235950

Adjacent sequences: A236422 A236423 A236424 * A236426 A236427 A236428

Keyword

nonn

Author

R. H. Hardin, Jan 25 2014

Status

approved