A280179 Number of nX7 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

15, 656, 13720, 202693, 2665301, 31821879, 359880117, 3910652938, 41205820599, 424186764568, 4286516071132, 42663698232264, 419306557225259, 4077141776062489, 39281413060768999, 375445083262145664

Offset

1,1

Comments

Column 7 of A280180.

Links

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

Example

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

Crossrefs

Cf. A280180.

Sequence in context: A351180 A092958 A222268 * A223203 A279465 A349889

Adjacent sequences: A280176 A280177 A280178 * A280180 A280181 A280182

Keyword

nonn

Author

R. H. Hardin, Dec 28 2016

Status

approved