|
|
A223677
|
|
Number of nX5 0..1 arrays with rows and antidiagonals unimodal
|
|
1
|
|
|
16, 256, 3177, 35509, 384009, 4106403, 43632367, 462307835, 4893189359, 51766786082, 547539109894, 5790804006475, 61241515380486, 647657786582245, 6849233638750700, 72433084682283498, 766004610399351979
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 16*a(n-1) -65*a(n-2) +116*a(n-3) -387*a(n-4) -316*a(n-5) +5502*a(n-6) -6052*a(n-7) -5304*a(n-8) +10256*a(n-9) -13182*a(n-10) +1596*a(n-11) +36430*a(n-12) -48912*a(n-13) +27205*a(n-14) -2186*a(n-15) -10400*a(n-16) +7800*a(n-17) -2128*a(n-18) +192*a(n-19)
|
|
EXAMPLE
|
Some solutions for n=3
..0..0..0..0..0....0..0..0..1..0....1..0..0..0..0....0..0..1..1..1
..0..0..1..0..0....1..1..1..1..0....0..0..1..0..0....1..1..1..1..0
..0..0..0..1..0....0..1..1..1..1....0..0..0..1..0....0..0..0..1..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|