A278731 Number of nX5 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

456, 121520, 28637916, 6410559865, 1351385130108, 268284486351027, 50067074390669892, 8732216738504713198, 1415177080112634284232, 212485358907612452321760, 29562031801069787043980684

Offset: 1

Author

R. H. Hardin, Nov 27 2016

Keywords

• nonn

Comments

Column 5 of A278734.

Examples

			Some solutions for n=2
..1..3..3..2..1. .1..3..2..2..0. .3..1..2..1..0. .3..2..1..0..0
..3..2..2..3..1. .2..1..1..0..2. .3..2..0..1..0. .0..1..2..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..50

Crossrefs

Cf. A278734.