A278655 Number of nX7 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

504, 2080575, 2864009499, 3014441325194, 2738085955639984, 2208684003726307854, 1606277016357286546242, 1064650757873104185361759, 648100425195945762366583042, 364419942118182508200030228710

Offset

1,1

Comments

Column 7 of A278656.

Links

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

Example

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

Crossrefs

Cf. A278656.

Sequence in context: A289637 A226266 A278371 * A068299 A003798 A003791

Adjacent sequences: A278652 A278653 A278654 * A278656 A278657 A278658

Keyword

nonn

Author

R. H. Hardin, Nov 25 2016

Status

approved