A317603 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

64, 1709, 40080, 994993, 25248997, 679103465, 18167894481, 485582717996, 13027760526423, 349547081066847, 9374634814121793, 251466646898614740, 6745900361432771158, 180960374468629585921, 4854296041561377706389

Offset

1,1

Comments

Column 7 of A317604.

Links

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

Example

Some solutions for n=5
..0..0..0..1..0..1..1. .0..0..0..0..0..0..0. .0..0..0..1..0..1..0
..0..0..0..0..0..1..1. .0..0..1..1..0..0..0. .0..0..0..0..0..0..0
..0..0..0..0..1..1..0. .0..0..0..1..0..0..1. .0..0..0..0..0..0..0
..0..0..0..1..0..0..0. .0..0..0..0..0..0..0. .0..0..0..0..1..1..0
..0..0..0..1..1..0..0. .0..0..0..1..0..0..0. .0..0..0..0..0..0..1

Crossrefs

Cf. A317604.

Sequence in context: A305592 A317010 A316875 * A269660 A234240 A017115

Adjacent sequences: A317600 A317601 A317602 * A317604 A317605 A317606

Keyword

nonn

Author

R. H. Hardin, Aug 01 2018

Status

approved