A235412 Number of (n+1)X(7+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise

3249, 62070, 1623115, 48788187, 1561049902, 48150637857, 1547599117420, 44262446103282, 1328377496969266, 34333220990606470, 936029519726732770, 21814340948244417848

Offset

1,1

Comments

Column 7 of A235413

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A253332 A253325 A204038 * A048421 A238254 A187135

Adjacent sequences: A235409 A235410 A235411 * A235413 A235414 A235415

Keyword

nonn

Author

R. H. Hardin, Jan 10 2014

Status

approved