A279983 Number of 7Xn 0..1 arrays with no element equal 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.

0, 1205, 43543, 876704, 15071233, 237386464, 3444870482, 47830833513, 640788381590, 8346437314513, 106354332622511, 1330883900649974, 16405039161663344, 199652460980584803, 2403337808498154619

Offset

1,2

Comments

Row 7 of A279977.

Links

R. H. Hardin, Table of n, a(n) for n = 1..48

Example

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

Crossrefs

Cf. A279977.

Sequence in context: A259521 A190031 A254694 * A187862 A186864 A338963

Adjacent sequences: A279980 A279981 A279982 * A279984 A279985 A279986

Keyword

nonn

Author

R. H. Hardin, Dec 24 2016

Status

approved