A284080 Number of 6Xn 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.

0, 0, 37557, 2816826, 188451507, 11888242488, 690497721277, 38373427448124, 2066968333513522, 108420537349373668, 5571748174347914144, 281628555096973980684, 14037532233093064300116, 691473229181393813694060

Offset

1,3

Comments

Row 6 of A284075.

Links

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

Example

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

Crossrefs

Cf. A284075.

Sequence in context: A165284 A235298 A233662 * A092682 A236122 A320208

Adjacent sequences: A284077 A284078 A284079 * A284081 A284082 A284083

Keyword

nonn

Author

R. H. Hardin, Mar 19 2017

Status

approved