A278308 Number of nX7 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

504, 197981, 114457714, 69684770828, 38819080346585, 20065923383306483, 10174217016822816668, 5193800251722254864596, 2618709455820562585030428, 1260058503482337718156082135, 564882872428920086722942207177

Offset: 1

Author

R. H. Hardin, Nov 17 2016

Keywords

• nonn

Comments

Column 7 of A278309.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..19

Crossrefs

Cf. A278309.