A278413 Number of nX7 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

1107, 1046418, 859516239, 724313811311, 615691843257769, 495717541750226155, 361990594590395633400, 238604620055755341800773, 144303226542829352792147114, 81817177352955986859566458268

Offset

1,1

Comments

Column 7 of A278414.

Links

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

Example

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

Crossrefs

Cf. A278414.

Sequence in context: A184370 A172638 A278633 * A172739 A172815 A172866

Adjacent sequences: A278410 A278411 A278412 * A278414 A278415 A278416

Keyword

nonn

Author

R. H. Hardin, Nov 21 2016

Status

approved