|
|
A302012
|
|
Number of 5Xn 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
|
|
1
|
|
|
16, 512, 13616, 368144, 9989376, 270990144, 7350348800, 199375282176, 5407964088576, 146688598302720, 3978862338503680, 107924853732951040, 2927413180587028480, 79404767608300756992, 2153818654894959054848
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 24*a(n-1) +100*a(n-2) -348*a(n-3) -1856*a(n-4) +1536*a(n-5) +14848*a(n-6) +2048*a(n-7) -65024*a(n-8) -40960*a(n-9) +139264*a(n-10) +102400*a(n-11) -147456*a(n-12) for n>15
|
|
EXAMPLE
|
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
..0..0..1..0..1. .0..0..1..0..0. .0..0..1..1..0. .0..0..1..0..1
..1..1..0..0..1. .0..1..0..1..0. .0..0..0..1..1. .1..0..0..0..0
..0..0..1..0..1. .1..1..0..0..1. .0..1..1..0..1. .0..1..0..0..1
..0..1..0..0..1. .0..1..1..0..0. .0..0..1..1..0. .0..0..1..1..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|