|
|
A219418
|
|
Unchanging value maps: number of n X 5 binary arrays indicating the locations of corresponding elements unequal to no horizontal or antidiagonal neighbor in a random 0..2 n X 5 array.
|
|
1
|
|
|
12, 160, 2121, 28154, 372560, 4934366, 65352789, 865523957, 11462977378, 151815415029, 2010639231109, 26628853182336, 352671832205165, 4670776468884680, 61859640739887596, 819267455394261112
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 14*a(n-1) -17*a(n-2) +117*a(n-3) -355*a(n-4) +550*a(n-5) -1954*a(n-6) +1579*a(n-7) -1059*a(n-8) -1065*a(n-9) +1097*a(n-10) +8*a(n-11) -153*a(n-12) +45*a(n-13) -6*a(n-14) for n>15.
|
|
EXAMPLE
|
Some solutions for n=3:
..1..0..0..0..0....0..0..1..0..0....0..0..0..0..0....0..0..1..1..1
..0..0..0..0..1....1..0..0..1..1....0..0..0..1..0....0..0..1..0..0
..1..1..0..0..0....0..0..0..0..0....0..0..0..0..1....0..0..0..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|