A297229 Number of 7Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 neighboring 1s.
1, 189, 1620, 9861, 171851, 2063378, 20599895, 248421807, 2936448567, 33036817382, 380933664485, 4411216117906, 50689193709680, 583360678744857, 6721605421544199, 77399781711154720, 891207805003409728
Offset: 1
Keywords
Examples
Some solutions for n=5 ..0..0..0..0..0. .0..1..0..0..0. .0..0..0..1..1. .0..0..0..0..0 ..1..1..0..0..0. .1..0..0..1..1. .0..1..0..0..0. .0..0..0..0..0 ..0..1..1..0..0. .0..0..0..0..0. .1..0..1..0..0. .0..1..0..1..0 ..0..0..0..0..0. .0..0..0..0..0. .0..1..0..0..1. .1..0..1..0..0 ..0..0..0..0..0. .0..0..0..1..1. .0..0..0..1..0. .0..0..0..0..0 ..1..1..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..1..0..0 ..0..0..0..1..1. .0..1..1..0..0. .0..0..0..1..1. .0..1..0..0..0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Crossrefs
Cf. A297224.
Comments