A266938 Number of 5Xn binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.

6, 19, 44, 100, 210, 429, 816, 1534, 2727, 4753, 7931, 13044, 20676, 32360, 49327, 73959, 108612, 157751, 224746, 317514, 440564, 606496, 823905, 1110469, 1480403, 1957027, 2563177, 3335398, 4302564, 5520403, 7021711, 8888187, 11173884

Offset: 1

Author

R. H. Hardin, Jan 06 2016

Keywords

• nonn

Comments

Row 5 of A266935.

Examples

			Some solutions for n=4
..0..1..1..1....0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..0
..1..0..1..1....0..0..0..0....1..1..1..0....0..0..1..1....0..0..0..0
..1..1..0..1....0..0..0..0....1..1..1..0....1..1..0..0....0..0..1..1
..1..1..1..0....0..0..0..1....1..1..1..0....1..1..0..1....1..1..0..1
..1..1..1..1....1..1..1..0....1..1..1..1....1..1..1..0....1..1..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..57

Crossrefs

Cf. A266935.