OFFSET
1,5
COMMENTS
Table starts
.1.....1.....1.......1........1..........1...........1.............1
.1.....4.....8......24.......82........272.........908..........3076
.1.....8....13......60......217........749........2822.........10516
.1....24....60.....418.....2186......12281.......72713........423041
.1....82...217....2186....16782.....127607.....1061345.......8678318
.1...272...749...12281...127607....1368963....16063367.....183955750
.1...908..2822...72713..1061345...16063367...274090332....4486557450
.1..3076.10516..423041..8678318..183955750..4486557450..104360036860
.1.10444.38934.2465234.70215574.2091952988.72881502770.2402493576235
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) = 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 70] for n>72
EXAMPLE
Some solutions for n=5 k=4
..0..1..1..1. .0..0..0..0. .0..1..0..1. .0..1..0..1. .0..1..1..1
..1..0..0..0. .1..1..1..1. .0..1..0..0. .0..1..1..0. .1..0..0..0
..0..0..1..0. .1..1..1..1. .1..1..1..1. .1..1..1..0. .1..1..1..1
..0..1..1..0. .1..1..1..1. .1..0..1..1. .0..1..1..1. .0..1..1..1
..0..1..1..0. .0..0..0..0. .1..0..0..0. .0..1..0..0. .0..1..1..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, May 14 2018
STATUS
approved