OFFSET
1,7
COMMENTS
Table starts
....0........1............0..............3................6...............24
....1........0...........15............142.............1350............12858
....0.......15..........474..........14281...........399487.........11023893
....3......142........14281........1230799.........99427182.......7837914954
....6.....1350.......399487.......99427182......23145488444....5222809114196
...24....12858.....11023893.....7837914954....5222809114196.3362092868045434
...72...119396....295670293...601248781220.1145113368668739
..232..1095012...7789959515.45231133438998
..720..9924024.202165948916
.2232.89076240
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..71
FORMULA
Empirical for column k:
k=1: a(n) = 6*a(n-1) -6*a(n-2) -16*a(n-3) +12*a(n-4) +24*a(n-5) +8*a(n-6) for n>8
k=2: [order 18] for n>19
k=3: [order 54] for n>58
EXAMPLE
Some solutions for n=3 k=4
..0..1..1..1. .0..1..1..1. .0..1..2..0. .0..0..1..2. .0..1..2..0
..1..0..1..0. .2..0..0..2. .2..0..2..2. .1..1..0..0. .2..0..0..2
..0..1..0..1. .1..2..2..2. .0..2..2..1. .1..1..0..2. .2..0..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 23 2016
STATUS
approved