A281805 Number of 4Xn 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, 34, 324, 1916, 12318, 71290, 396185, 2143364, 11250451, 57853036, 292724002, 1458437418, 7182757280, 35002131964, 169019645294, 809806421452, 3852574230183, 18214915308180, 85640566518922, 400632266290872

Offset

1,2

Comments

Row 4 of A281802.

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..0..1. .0..0..0..0. .0..0..1..0. .0..0..0..0
..0..0..1..1. .1..0..1..0. .0..1..0..0. .1..1..0..0. .1..1..1..1
..0..1..0..0. .0..1..1..1. .1..0..0..0. .1..1..0..1. .0..1..1..0
..1..1..1..0. .1..0..0..0. .0..1..0..0. .0..0..1..0. .1..1..1..1

Crossrefs

Cf. A281802.

Sequence in context: A160146 A101092 A233061 * A034978 A251938 A059338

Adjacent sequences: A281802 A281803 A281804 * A281806 A281807 A281808

Keyword

nonn

Author

R. H. Hardin, Jan 30 2017

Status

approved