A281806 Number of 5Xn 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

0, 87, 865, 8354, 71445, 575062, 4480480, 33526931, 246399359, 1768719496, 12506519769, 87220471545, 600957372469, 4100864353926, 27733540904781, 186134535819880, 1240811810649533, 8221127809327654, 54176483907555951

Offset

1,2

Comments

Row 5 of A281802.

Links

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

Example

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

Crossrefs

Cf. A281802.

Sequence in context: A297723 A061625 A220055 * A128956 A283952 A294907

Adjacent sequences: A281803 A281804 A281805 * A281807 A281808 A281809

Keyword

nonn

Author

R. H. Hardin, Jan 30 2017

Status

approved