|
| |
|
|
A269072
|
|
Number of nX5 binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
|
|
1
|
|
|
|
23, 185, 1887, 17713, 165607, 1529241, 14011359, 127528641, 1154377943, 10400164377, 93314875007, 834244316721, 7434343205095, 66061046189497, 585498663953471, 5177144091416833, 45680435610848791, 402277442193052665
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
|
|
|
LINKS
|
|
|
|
FORMULA
|
Empirical: a(n) = 24*a(n-1) -198*a(n-2) +584*a(n-3) +137*a(n-4) -2864*a(n-5) +1132*a(n-6) +4336*a(n-7) -1391*a(n-8) -2280*a(n-9) +90*a(n-10) +200*a(n-11) -25*a(n-12)
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..1..0..0..1. .1..0..0..1..0. .1..0..1..0..1. .1..0..1..0..1
..1..0..0..0..1. .1..0..1..0..0. .1..0..1..0..0. .0..0..1..0..1
..1..0..0..0..0. .1..0..0..0..1. .0..0..0..0..1. .0..1..0..0..1
..0..0..0..0..1. .0..0..0..0..1. .0..0..0..1..0. .0..0..0..0..1
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
