OFFSET
1,8
COMMENTS
Table starts
.0....0.......0..........0............0............0............0
.0....0.......2..........8...........30..........120..........506
.0....2......28........270.........2966........34684.......405122
.0....8.....270.......7078.......225010......7476932....239885668
.0...30....2966.....225010.....20908278...1902360932.166037342468
.0..120...34684....7476932...1902360932.466409047158
.0..506..405122..239885668.166037342468
.0.2144.4682406.7573457652
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..71
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = 5*a(n-1) -5*a(n-2) +5*a(n-3) +8*a(n-4)
k=3: [order 20]
EXAMPLE
Some solutions for n=3 k=4
..0..3..4..5....0..1..2..3....0..5..4..5....0..1..2..1....0..1..0..5
..1..2..1..0....3..4..1..4....1..4..1..0....5..4..3..2....5..2..5..4
..0..3..4..5....2..5..0..5....2..3..2..5....0..1..2..1....4..3..4..3
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 24 2013
STATUS
approved