|
|
A316172
|
|
Number of nX4 0..1 arrays with every element unequal to 1, 2, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
|
|
1
|
|
|
2, 10, 34, 72, 331, 1425, 5297, 18573, 84658, 341907, 1283578, 5514353, 22476568, 88705477, 368744149, 1503571517, 6058762423, 24862968921, 101355031741, 411492561255, 1680909735969, 6851310177747, 27886986592236, 113739441284254
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical recurrence of order 64 (see link above)
|
|
EXAMPLE
|
Some solutions for n=5
..0..0..0..1. .0..0..0..1. .0..1..0..0. .0..1..1..0. .0..0..0..0
..1..0..0..1. .0..1..1..1. .1..0..0..1. .0..0..0..0. .1..0..0..1
..0..0..0..0. .0..0..0..1. .0..0..0..0. .0..0..0..0. .0..0..0..0
..1..0..0..1. .1..0..1..0. .0..1..0..0. .1..0..0..1. .1..0..0..1
..0..0..1..0. .0..0..0..0. .0..0..1..0. .1..0..0..0. .0..0..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|