login
A295414
Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 3 1s.
1
21, 1632, 68613, 3019079, 136204120, 6093564449, 272714953724, 12210363190599, 546643613178667, 24472619590752067, 1095614774297460793, 49049522462925007446, 2195896628441171409216, 98308031733968098712078
OFFSET
1,1
COMMENTS
Column 6 of A295416.
FORMULA
Empirical recurrence of order 78 (see link above)
EXAMPLE
Some solutions for n=5
..0..0..0..0..1..1. .0..0..0..1..1..0. .0..0..0..1..1..0. .0..0..1..0..1..1
..0..0..1..1..0..1. .0..0..0..0..1..1. .0..0..0..1..0..0. .0..0..1..0..1..1
..0..0..0..1..0..0. .0..0..0..1..1..0. .0..0..0..0..1..1. .0..0..0..0..1..0
..0..0..0..0..1..0. .0..0..0..1..0..0. .0..0..1..0..1..0. .0..0..0..1..1..1
..0..0..1..1..1..1. .0..0..0..1..1..0. .0..0..1..0..1..0. .0..0..0..0..0..0
CROSSREFS
Cf. A295416.
Sequence in context: A239267 A258305 A081786 * A202800 A203361 A192843
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 22 2017
STATUS
approved