OFFSET
1,4
COMMENTS
Table starts
....1.......1..........3.............11................48...................236
....1.......3.........36............528..............8256................131328
....3......36.......1440..........62720...........2779136.............123551744
...11.....528......62720........7802880.........981532672..........123833679872
...48....8256....2779136......981532672......352524959744.......127365174788096
..236..131328..123551744...123833679872...127365174788096....132364161848967168
.1248.2098176.5496242176.15635845218304.46111939268444160.138127371171167993856
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = 12*a(n-1) -44*a(n-2) +48*a(n-3) for n>4
k=2: a(n) = 20*a(n-1) -64*a(n-2) for n>3
k=3: a(n) = 64*a(n-1) -960*a(n-2) +4096*a(n-3) for n>4
k=4: [order 5] for n>6
k=5: [order 10] for n>11
k=6: [order 22] for n>23
EXAMPLE
Some solutions for n=3 k=4
..0..1..2..7....0..1..2..0....0..1..2..3....0..1..2..7....0..1..7..2
..3..7..4..5....5..3..6..3....5..4..6..5....5..7..3..6....5..3..6..4
..6..5..7..6....6..7..2..6....6..2..3..6....3..5..0..3....6..7..2..6
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 05 2013
STATUS
approved