|
|
A239652
|
|
Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4
|
|
1
|
|
|
22, 560, 13476, 320314, 7629186, 181039448, 4304123072, 102200616210, 2428626527384, 57685354968172, 1370565397733518, 32557886444429002, 773502177670875660, 18375412388378425556, 436547133372227822360
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical recurrence of order 91 (see link above)
|
|
EXAMPLE
|
Some solutions for n=3
..1..0..0....3..0..1....1..0..0....1..3..3....3..1..3....1..0..0....1..0..0
..1..3..1....2..3..0....1..0..0....1..2..0....3..1..2....1..0..3....2..0..3
..2..0..1....2..3..0....3..0..1....2..1..0....2..1..1....1..0..0....3..1..3
..1..0..3....3..1..1....1..0..0....1..2..0....3..2..3....3..1..3....2..1..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|