A268016 Number of nX4 0..2 arrays with every repeated value in every row and column greater than or equal to the previous repeated value.

78, 6084, 474552, 31831908, 2012075697, 119453097281, 6761580343329, 367501986337710, 19300005472710895, 983989084426524929, 48888960624425750151, 2374418848334124952354, 113014440791056538695922

Offset: 1

Author

R. H. Hardin, Jan 24 2016

Keywords

• nonn

Comments

Column 4 of A268019.

Examples

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

Links

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

Crossrefs

Cf. A268019.