OFFSET
1,1
COMMENTS
Table starts
.......40.........180............816.............3728...............17152
......180........1246...........8870............65040..............489772
......816........8870.........102811..........1273440............16687766
.....3728.......65040........1273440.........27920380...........667858580
....17152......489772.......16687766........667858580.........29868134632
....79424.....3775022......228610911......16965787428.......1430667235078
...369920....29664576.....3233921644.....447556857260......71260903869938
..1731840...236740252....46763019686...12076357468990....3627694408668076
..8144896..1912108322...686058347195..330184315214356..186917463235694336
.38458368.15584536740.10159339091240.9097022461368016.9695744269718563214
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..264
FORMULA
Empirical for column k:
k=1: a(n) = 8*a(n-1) -12*a(n-2) -16*a(n-3)
k=2: a(n) = 18*a(n-1) -90*a(n-2) +7*a(n-3) +576*a(n-4) +210*a(n-5) -180*a(n-6)
k=3: [order 14]
k=4: [order 30]
k=5: [order 65]
EXAMPLE
Some solutions for n=3 k=4
..0..0..0..0..0....0..0..0..2..2....0..0..1..2..2....0..0..0..0..0
..2..0..2..0..2....2..0..2..2..0....0..2..1..0..0....0..2..2..0..2
..0..0..2..2..2....2..2..2..2..0....2..0..1..0..2....0..2..0..0..2
..0..2..2..0..2....1..1..1..1..1....1..1..0..1..1....2..2..2..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Nov 30 2014
STATUS
approved