OFFSET
1,8
COMMENTS
Table starts
.0...0.....0.......0.........0............0..............0................0
.0...1.....3.......6........17...........41............104..............261
.0...3.....9......21.......127..........513...........2440............11458
.0...6....21.....110......1045.........7322..........60497...........482261
.0..17...127....1045.....18075.......242872........3570731.........52303834
.0..41...513....7322....242872......5918418......160441457.......4287985074
.0.104..2440...60497...3570731....160441457.....7844725524.....380985444657
.0.261.11458..482261..52303834...4287985074...380985444657...33608679844048
.0.655.53727.3886764.766622466.114829835558.18510417612668.2967985050748586
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) = a(n-1) +3*a(n-2) +2*a(n-3)
k=3: [order 12] for n>14
k=4: [order 45] for n>48
EXAMPLE
Some solutions for n=5 k=5
..0..0..0..1..1. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0
..0..0..0..1..1. .0..0..1..1..1. .0..0..0..1..1. .0..1..1..1..0
..0..0..0..1..1. .0..0..1..1..1. .0..0..0..1..1. .0..1..1..1..0
..1..1..1..1..0. .0..1..0..0..0. .1..1..1..0..0. .0..1..1..1..0
..1..1..1..0..0. .1..1..0..0..0. .1..1..1..1..0. .0..0..0..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 27 2018
STATUS
approved