OFFSET
1,8
COMMENTS
Table starts
.0...0....0......0........0..........0............0..............0
.0...1....2......4........9.........19...........41.............88
.0...2....2.....10.......30........104..........340...........1144
.0...4...10.....64......316.......1789.........9738..........54293
.0...9...30....316.....2998......28089.......268615........2552014
.0..19..104...1789....28089.....456649......7455411......121708555
.0..41..340...9738...268615....7455411....209156119.....5850560104
.0..88.1144..54293..2552014..121708555...5850560104...280782187131
.0.189.3795.300456.24338903.1990954802.164070075524.13506744672543
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..241
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = a(n-1) +2*a(n-2) +a(n-3)
k=3: [order 15]
k=4: [order 49]
EXAMPLE
Some solutions for n=5 k=4
..0..0..0..1. .0..0..0..0. .0..0..0..0. .0..0..1..1. .0..0..0..1
..0..0..1..1. .0..1..1..0. .0..1..0..1. .0..1..1..0. .0..0..1..1
..0..1..0..0. .0..1..0..0. .1..1..1..1. .1..1..0..0. .0..0..1..0
..1..1..0..0. .0..0..0..1. .1..0..1..1. .0..0..1..1. .1..1..0..0
..1..0..0..0. .0..0..1..1. .0..0..1..1. .0..1..1..1. .1..0..0..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Mar 10 2018
STATUS
approved