|
|
A257266
|
|
Number of (n+2)X(1+2) 0..2 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum
|
|
1
|
|
|
9300, 119716, 1257600, 13089924, 121905264, 1125468304, 9711591328, 83266873600, 683489995584, 5585092358400, 44329493636352, 350732890002496, 2720435020545280, 21053754624774400, 160717099201132032
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical recurrence of order 48 (see link above)
|
|
EXAMPLE
|
Some solutions for n=2
..2..0..0....1..1..1....0..0..0....0..2..1....1..1..0....1..2..0....2..0..0
..2..0..1....1..2..1....0..1..1....1..0..0....2..0..0....2..2..1....2..1..2
..2..2..0....0..2..1....1..2..1....0..1..1....2..2..2....0..2..2....0..1..2
..0..0..0....0..2..2....1..0..2....1..0..2....1..2..1....0..2..0....0..0..2
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|