A250425 Number of (n+1) X (n+1) 0..1 arrays with nondecreasing sum of every two consecutive values in every row and column.

16, 108, 1296, 12000, 160000, 1715000, 24010000, 280052640, 4032758016, 49700008512, 728933458176, 9337998878208, 138735983333376, 1829038842774000, 27435582641610000, 369797030228340000, 5588044012339360000

Offset

1,1

Comments

Diagonal of A250432.

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Formula

a(n+1) = A202092(n). - R. J. Mathar, Dec 04 2014

Example

Some solutions for n=5
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..1..0
..0..0..0..0..1..0....0..0..0..1..0..1....0..0..0..0..1..1....0..0..0..1..1..1
..0..0..0..1..1..1....0..0..0..0..1..1....0..0..0..1..1..1....1..0..1..0..1..1
..0..0..0..0..1..0....0..0..0..1..1..1....0..1..1..1..1..1....0..1..0..1..1..1
..1..1..1..1..1..1....1..0..1..0..1..1....1..1..1..1..1..1....1..0..1..0..1..1
..0..0..0..1..1..1....1..0..1..1..1..1....0..1..1..1..1..1....0..1..0..1..1..1

Crossrefs

Cf. A202092, A250432.

Sequence in context: A269188 A165558 A337391 * A238171 A155871 A120668

Adjacent sequences: A250422 A250423 A250424 * A250426 A250427 A250428

Keyword

nonn

Author

R. H. Hardin, Nov 22 2014

Status

approved