A281771 Number of 7Xn 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

0, 120, 672, 18358, 201450, 2848436, 38998648, 491290688, 6531040026, 83421129072, 1061825672182, 13538745056328, 170149200534678, 2139241444399412, 26751312122710302, 332989768683012174

Offset

1,2

Comments

Row 7 of A281765.

Links

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

Example

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

Crossrefs

Cf. A281765.

Sequence in context: A306373 A356548 A113546 * A166069 A114887 A069085

Adjacent sequences: A281768 A281769 A281770 * A281772 A281773 A281774

Keyword

nonn

Author

R. H. Hardin, Jan 29 2017

Status

approved