A302074 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
64, 8192, 190528, 6048836, 180330117, 5420105343, 163660519064, 4926680696151, 148486135409554, 4473321647227168, 134766772583347037, 4060050293871714740, 122318436951115950082, 3685280972257096460292, 111034886878989197205405
Offset: 1
Keywords
Examples
Some solutions for n=5 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 ..1..1..1..0..0. .1..1..1..0..0. .1..1..1..0..0. .1..1..1..0..0 ..0..0..1..0..0. .0..0..1..0..0. .0..0..1..0..0. .0..0..1..0..1 ..0..0..1..0..1. .0..1..1..0..0. .0..0..1..0..1. .1..0..0..0..0 ..0..1..1..0..1. .0..0..1..1..1. .0..1..0..1..1. .1..0..1..1..1 ..0..1..0..0..1. .0..1..0..1..0. .1..1..0..1..0. .0..1..0..1..0 ..0..1..0..0..0. .0..1..0..1..0. .0..1..0..0..1. .0..1..0..1..0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Crossrefs
Cf. A302069.
Comments