OFFSET
1,2
COMMENTS
Table starts
....1......2.......5........14..........41..........122............365
....2.....14......81.......486........2916........17496.........104976
....5.....54.....288......1536........8192........43712.........235072
...14....216....1024......6156.......38256.......239112........1530060
...41....864....4100.....31536......266116......2292520.......20917472
..122...3456...16956....175152.....2130176.....26615196......351504904
..365..13824...70272....982152....17258544....306863916.....5814135340
.1094..55296..291320...5645376...142784608...3682615020...101593710948
.3281.221184.1211092..33154200..1211010160..45094867336..1804283175916
.9842.884736.5070832.197081664.10285035212.548546009720.31575745629020
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = 4*a(n-1) -3*a(n-2)
k=2: a(n) = 4*a(n-1) for n>3
k=3: [order 17] for n>20
Empirical for row n:
n=1: a(n) = 4*a(n-1) -3*a(n-2)
n=2: a(n) = 6*a(n-1) for n>3
n=3: [order 18] for n>20
n=4: [order 41] for n>43
EXAMPLE
Some solutions for n=4 k=4
..0..1..0..2. .0..1..1..2. .0..1..0..0. .0..1..1..1. .0..1..2..1
..1..0..1..0. .2..2..2..0. .1..2..2..0. .1..2..2..0. .0..2..1..2
..0..2..0..1. .0..2..0..0. .2..2..2..1. .2..2..0..0. .0..1..2..0
..2..2..1..0. .0..1..1..1. .0..0..1..1. .0..0..1..1. .0..2..1..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jul 24 2016
STATUS
approved