A281887 Number of nX7 0..1 arrays with no element equal to more than four of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

0, 0, 241209, 13907664, 663476572, 29340232714, 1239784258612, 50762954675186, 2032908127837419, 80080573259154704, 3113883115269131234, 119819798899454537026, 4571113264552325706845, 173137719486843965997050

Offset

1,3

Comments

Column 7 of A281888.

Links

R. H. Hardin, Table of n, a(n) for n = 1..68

Example

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

Crossrefs

Cf. A281888.

Sequence in context: A187960 A190388 A249194 * A127881 A134857 A251007

Adjacent sequences: A281884 A281885 A281886 * A281888 A281889 A281890

Keyword

nonn

Author

R. H. Hardin, Feb 01 2017

Status

approved