|
|
A219981
|
|
Unmatched value maps: number of nX4 binary arrays indicating the locations of corresponding elements not equal to any horizontal, vertical or antidiagonal neighbor in a random 0..3 nX4 array
|
|
1
|
|
|
7, 154, 2344, 34212, 507655, 7542829, 111990804, 1662706049, 24686644236, 366529445423, 5441957364383, 80798147898113, 1199631049503365, 17811233176117311, 264447995737166473, 3926327939543345163
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 16*a(n-1) -34*a(n-2) +277*a(n-3) -479*a(n-4) +1450*a(n-5) -2148*a(n-6) +1689*a(n-7) +1083*a(n-8) -5544*a(n-9) +5188*a(n-10) +768*a(n-11) -4869*a(n-12) +2792*a(n-13) +402*a(n-14) -720*a(n-15) +41*a(n-16) +129*a(n-17) -50*a(n-18) +14*a(n-19) -5*a(n-20) +a(n-21)
|
|
EXAMPLE
|
Some solutions for n=3
..1..1..1..0....1..0..1..1....1..1..1..1....1..1..1..1....0..0..1..1
..0..1..0..0....0..0..1..0....0..0..0..0....1..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....1..0..1..1....1..1..1..0....1..1..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|