OFFSET
1,1
COMMENTS
Table starts
...2.......3...........8...............23................67...............200
...3......17.........173.............2067.............24687............296225
...8.....173........8099...........457757..........25806394........1469325216
..23....2067......457757........130504565.......36671816671....10436759312923
..67...24687....25806394......36671816671....51240208193188.72687824624930136
.200..296225..1469325216...10436759312923.72687824624930136
.597.3553436.83724117885.2973220065573027
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..60
FORMULA
Empirical for column k:
k=1: a(n) = 3*a(n-1) +a(n-5) -3*a(n-6)
EXAMPLE
Some solutions for n=3 k=4
..0..0..4..4..1....1..0..3..0..4....1..4..4..1..2....0..4..0..3..2
..0..3..2..3..0....0..1..2..0..1....0..4..2..0..0....0..1..3..1..4
..4..0..4..3..3....1..1..3..4..2....3..3..0..1..0....4..2..2..1..0
..2..2..2..4..3....2..3..0..2..4....3..1..0..2..3....2..4..3..2..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 19 2015
STATUS
approved