A278380 Number of nX3 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

0, 3, 74, 1220, 12910, 100807, 652343, 3750182, 19784428, 96786947, 439906101, 1859501560, 7328752206, 27039030100, 93829708460, 307762056698, 958683800155, 2848583303210, 8105942966932, 22169003715353, 58456685214757

Offset

1,2

Comments

Column 3 of A278385.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 31

Formula

Empirical polynomial of degree 31 (see link above)

Example

Some solutions for n=4
..1..0..0. .0..0..0. .1..1..0. .1..1..1. .1..1..0. .1..0..0. .0..1..1
..0..1..1. .1..0..0. .0..1..0. .1..1..0. .0..1..1. .0..0..0. .0..1..0
..1..0..1. .0..1..0. .1..0..1. .0..1..0. .0..1..0. .0..1..0. .1..1..0
..1..0..0. .0..1..0. .1..0..0. .0..1..0. .1..0..0. .1..0..1. .1..0..0

Crossrefs

Cf. A278385.

Sequence in context: A215961 A231780 A093183 * A290774 A229852 A265956

Adjacent sequences: A278377 A278378 A278379 * A278381 A278382 A278383

Keyword

nonn

Author

R. H. Hardin, Nov 20 2016

Status

approved