A283493 Number of nX7 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element.

0, 1460, 402588, 44556288, 5074155320, 536229705204, 54620836862500, 5432594465187864, 530096184197639160, 50983454402298243104, 4847268086112091307116, 456542412664292202205844

Offset

1,2

Comments

Column 7 of A283494.

Links

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

Example

Some solutions for n=2
..0..1..1..0..1..0..1. .0..1..0..1..1..0..0. .0..1..1..0..0..0..1
..1..1..1..0..0..0..0. .1..1..1..1..1..1..1. .1..1..1..1..1..0..0

Crossrefs

Cf. A283494.

Sequence in context: A219722 A237947 A205316 * A232347 A251942 A251943

Adjacent sequences: A283490 A283491 A283492 * A283494 A283495 A283496

Keyword

nonn

Author

R. H. Hardin, Mar 08 2017

Status

approved