A278851 Number of nX4 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

0, 25, 1348, 30772, 449677, 4950399, 44571591, 344302564, 2353207764, 14536481606, 82424606803, 434031398793, 2141802790067, 9975624305928, 44106878749240, 186005545087412, 751100286992318, 2913746151722174

Offset: 1

Author

R. H. Hardin, Nov 29 2016

Keywords

• nonn

Comments

Column 4 of A278855.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 52

Crossrefs

Cf. A278855.

Formula

Empirical polynomial of degree 52 (see link above)