OFFSET
1,8
COMMENTS
Table starts
.0...0.....0......0........0..........0............0.............0
.0...1.....2......5.......10.........25...........54...........125
.0...2.....4.....13.......63........264.........1005..........4113
.0...5....13.....59......346.......2246........13650.........87117
.0..10....63....346.....3508......34704.......309593.......2960634
.0..25...264...2246....34704.....563977......8287084.....125919136
.0..54..1005..13650...309593....8287084....193439202....4672566734
.0.125..4113..87117..2960634..125919136...4672566734..177476979652
.0.282.16720.550582.27934888.1909040369.112689610775.6748480839625
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = 3*a(n-2) +4*a(n-3) +2*a(n-4)
k=3: [order 18]
k=4: [order 63] for n>64
EXAMPLE
Some solutions for n=5 k=4
..0..0..1..1. .0..0..1..1. .0..0..1..1. .0..0..0..1. .0..1..1..1
..0..1..0..1. .0..1..0..1. .0..1..0..1. .0..0..1..1. .0..0..1..1
..1..0..0..0. .0..1..0..0. .1..1..0..0. .0..1..0..1. .0..1..0..1
..0..1..1..0. .1..0..0..1. .1..0..0..1. .1..0..1..1. .1..0..0..1
..0..0..1..1. .1..1..1..1. .1..1..1..1. .1..1..1..1. .1..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 25 2018
STATUS
approved