OFFSET
1,8
COMMENTS
Table starts
.0..0....0.......0.........0...........0.............0.............0
.0..0....2.......0.........2..........12............18............56
.0..2....4......12.......100.........326..........2114..........9226
.0..0...12.....174.......816.......12210........108006.......1202184
.0..2..100.....816.....28772......497166......10872238.....222626294
.0.12..326...12210....497166....21835516.....888633610...37511690680
.0.18.2114..108006..10872238...888633610...75341251814.6484756891722
.0.56.9226.1202184.222626294.37511690680.6484756891722
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..112
FORMULA
Empirical for column k:
k=2: a(n) = 2*a(n-1) +a(n-2) +4*a(n-3) -4*a(n-4)
k=3: [order 19]
k=4: [order 95] for n>96
EXAMPLE
Some solutions for n=4 k=4
..0..2..1..0....0..2..1..0....0..1..2..1....0..1..0..2....0..1..2..0
..1..0..0..2....1..0..1..2....2..1..0..0....2..2..0..1....2..0..2..1
..2..0..1..1....2..0..0..0....0..1..2..2....1..0..1..2....1..2..0..2
..0..1..2..0....0..1..2..1....2..1..0..1....0..2..1..0....0..2..1..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 30 2013
STATUS
approved