|
|
A186197
|
|
Number of (n+1)X2 0..3 arrays with no 2X2 subblock diagonal sum less antidiagonal sum equal to any horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum
|
|
1
|
|
|
256, 3692, 53462, 773776, 11199932, 162110182, 2346415828, 33962540254, 491581127962, 7115251677062, 102987693303636, 1490666163351236, 21576224718636722, 312298946937347792, 4520282557655298722
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n)=6*a(n-1)+71*a(n-2)+539*a(n-3)+2454*a(n-4)+7868*a(n-5)+8056*a(n-6)-32420*a(n-7)-165096*a(n-8)-411360*a(n-9)-936288*a(n-10)-1586880*a(n-11)-1264896*a(n-12)-331776*a(n-13)
|
|
EXAMPLE
|
Some solutions for 3X2
..2..2....3..0....0..3....3..2....1..1....0..3....2..2....3..2....1..2....3..2
..3..3....0..0....1..2....0..1....0..0....0..2....0..0....3..1....2..1....2..2
..0..2....1..3....0..2....0..0....0..3....1..0....1..0....1..2....2..2....3..2
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|