OFFSET
1,7
COMMENTS
Table starts
...0.....1.......0..........3............3..............9...............15
...1.....0.......5.........18...........68............235..............801
...0.....5......38........254.........1433...........8330............46095
...3....18.....254.......2684........26157.........246237..........2241332
...3....68....1433......26157.......425588........6559816.........98128162
...9...235....8330.....246237......6559816......166229033.......4065077852
..15...801...46095....2241332.....98128162.....4065077852.....162346342126
..31..2678..250440...19885341...1427793365....96674459373....6294925767121
..57..8777.1332366..172968364..20331614084..2247110811000..238434528280477
.108.28343.6989712.1481176019.284582186755.51300573165630.8863487201716422
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = 3*a(n-1) -5*a(n-3) +3*a(n-5) +a(n-6)
k=2: [order 16]
k=3: [order 54] for n>55
EXAMPLE
Some solutions for n=4 k=4
..0..1..1..1. .0..1..1..0. .0..1..0..1. .0..1..1..1. .0..1..1..1
..0..1..0..1. .0..0..1..0. .1..1..0..1. .1..0..1..0. .1..0..0..1
..0..1..0..0. .0..0..1..0. .0..1..0..1. .1..0..1..1. .0..1..1..0
..0..1..0..1. .1..0..1..0. .1..1..1..0. .0..1..0..1. .0..0..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 13 2016
STATUS
approved