A281801 Number of nX7 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.

15, 1631, 29665, 396185, 4480480, 45696162, 436154254, 3971817891, 34908793027, 298606378335, 2499056501051, 20543237322520, 166370690422967, 1330405801987723, 10523787698414884, 82464458555125786, 640879467060438623

Offset

1,1

Comments

Column 7 of A281802.

Links

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

Example

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

Crossrefs

Cf. A281802.

Sequence in context: A209682 A209683 A249964 * A208000 A182925 A208020

Adjacent sequences: A281798 A281799 A281800 * A281802 A281803 A281804

Keyword

nonn

Author

R. H. Hardin, Jan 30 2017

Status

approved