A235554 Number of (n+1)X(6+1) 0..1 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise

1456, 27731, 892122, 33823017, 1271453587, 42883865335, 1280647786349, 33729294480195, 795966494233835, 16970688538136080, 331653138682479109, 5983009714922825733, 100686031573770031924, 1588391516232506517066

Offset

1,1

Comments

Column 6 of A235555

Links

R. H. Hardin, Table of n, a(n) for n = 1..32

Example

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

Crossrefs

Sequence in context: A203393 A235771 A351549 * A255345 A091715 A224528

Adjacent sequences: A235551 A235552 A235553 * A235555 A235556 A235557

Keyword

nonn

Author

R. H. Hardin, Jan 12 2014

Status

approved