OFFSET
1,5
COMMENTS
Table starts
..0.....1......1.......2.........3...........5............8.............13
..1.....4.....18......52.......174.........604.........2048...........6948
..1....18.....56.....223.......849........3387........13075..........51006
..2....52....223....1024......5360.......28374.......144040.........743640
..3...174....849....5360.....55390......482418......3860858.......34734150
..5...604...3387...28374....482418.....6525374.....76611604.....1041660250
..8..2048..13075..144040...3860858....76611604...1227812226....23819382545
.13..6948..51006..743640..34734150..1041660250..23819382545...723886147451
.21.23652.199243.3857242.308990628.14216373088.471369052777.22415064379413
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) +a(n-2)
k=2: a(n) = 4*a(n-1) -2*a(n-2) +2*a(n-3) -6*a(n-4) -4*a(n-5) for n>6
k=3: [order 20] for n>21
k=4: [order 68] for n>70
EXAMPLE
Some solutions for n=5 k=4
..0..0..1..1. .0..1..0..0. .0..1..0..1. .0..1..1..1. .0..0..1..0
..1..0..1..0. .0..1..0..1. .0..1..1..0. .1..0..0..1. .1..1..0..1
..1..1..0..0. .0..1..0..1. .0..1..0..1. .0..1..1..0. .1..1..1..1
..0..1..1..1. .0..1..0..1. .0..0..0..1. .1..0..0..1. .1..1..1..0
..0..1..1..1. .1..1..0..0. .0..1..1..1. .1..1..0..1. .0..0..1..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 06 2018
STATUS
approved