OFFSET
1,2
COMMENTS
Table starts
....1........2.............4..............12...............39..............138
....2.......15...........159............2191............30295...........421471
....4......159..........7445..........381958.........18691624........911680225
...12.....2191........381958........70985206......12341773443....2135811945390
...39....30295......18691624.....12341773443....7496016439865.4526538615127374
..138...421471.....911680225...2135811945390.4526538615127374
..499..5797959...43653230106.360625109847257
.1830.79367143.2074179818184
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..60
FORMULA
Empirical for column k:
k=1: a(n) = 6*a(n-1) -3*a(n-2) -30*a(n-3) +28*a(n-4) +36*a(n-5) -36*a(n-6) for n>8
k=2: [order 11] for n>13
k=3: [order 75]
EXAMPLE
Some solutions for n=3 k=4
..0..0..1..0....0..1..1..2....0..0..1..2....0..1..1..0....0..0..1..2
..0..1..2..2....0..1..2..3....0..1..0..3....0..2..1..1....0..3..0..1
..3..1..1..2....1..3..2..0....3..1..0..1....2..2..0..1....2..2..1..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 25 2016
STATUS
approved