|
|
A305251
|
|
Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4 or 8 king-move adjacent elements, with upper left element zero.
|
|
1
|
|
|
21, 127, 121, 356, 1010, 2985, 9288, 29714, 94491, 302488, 974340, 3152830, 10230396, 33285406, 108488648, 354109540, 1157319070, 3786080477, 12395839066, 40611746091, 133123022408, 436560165995, 1432171781602, 4699809062692
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=5
..0..0..0..0..0..0..0. .0..1..1..1..1..1..1. .0..0..1..1..1..1..0
..0..0..0..0..0..0..0. .1..1..1..1..1..1..0. .0..0..0..1..1..1..1
..0..0..0..0..0..0..0. .0..0..0..0..0..0..1. .0..0..0..0..1..1..1
..1..0..0..0..1..0..0. .0..1..0..0..0..0..0. .1..0..0..0..0..1..1
..1..1..0..0..0..0..0. .0..0..0..0..0..0..0. .1..1..0..0..0..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|