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

Author

R. H. Hardin, Nov 22 2014

Keywords

• nonn

Comments

Diagonal of A250432.

Examples

			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
		

Links

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

Crossrefs

Cf. A202092, A250432.

Formula

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