A280479 Number of nX7 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

54, 884, 55149, 3589912, 208736159, 11437392975, 599110195185, 30314748582007, 1492988077983829, 71948030099393732, 3405865992508069195, 158838750032932099900, 7314605470197927796802, 333202239966625982544310

Offset

1,1

Comments

Column 7 of A280480.

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

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

Crossrefs

Cf. A280480.

Sequence in context: A298132 A008401 A247048 * A107420 A298069 A281776

Adjacent sequences: A280476 A280477 A280478 * A280480 A280481 A280482

Keyword

nonn

Author

R. H. Hardin, Jan 04 2017

Status

approved