A278550 Number of nX4 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

65, 25402, 6207774, 1116456061, 157222953688, 19154084929099, 2139517647414832, 221564412439675221, 21066414746632008713, 1822505605184517876456, 143141100456641625969627

Offset

1,1

Comments

Column 4 of A278553.

Links

R. H. Hardin, Table of n, a(n) for n = 1..131

Example

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

Crossrefs

Cf. A278553.

Sequence in context: A349901 A355469 A084225 * A177652 A278795 A289946

Adjacent sequences: A278547 A278548 A278549 * A278551 A278552 A278553

Keyword

nonn

Author

R. H. Hardin, Nov 23 2016

Status

approved