|
|
A236994
|
|
Number of (n+1)X(5+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
|
|
1
|
|
|
32400, 699840, 14963200, 363916800, 8552563200, 192222720000, 4279521280000, 109212364800000, 2683631554560000, 62224920576000000, 1432701927424000000, 37708128681984000000, 957363336806400000000, 22733582315028480000000
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 1115200*a(n-4) -430632960000*a(n-8) +66962587648000000*a(n-12) -3428940827852800000000*a(n-16)
|
|
EXAMPLE
|
Some solutions for n=1
..2..0..1..0..0..2....2..2..0..2..2..1....0..1..0..2..2..1....1..1..0..0..1..1
..0..2..0..1..0..2....0..1..1..0..0..0....1..2..0..2..1..2....0..1..0..1..2..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|