OFFSET
1,2
COMMENTS
Table starts
....1.....2.......5.......14.........41..........122............365
....2.....9......54......324.......1944........11664..........69984
....5....24.....128......688.......3728........20224.........109760
...14....64.....396.....2564......17036.......114184.........767400
...41...172....1440....13156.....126420......1224088.......11894712
..122...476....5676....73012....1020324.....14005180......194398028
..365..1320...22844...409728....8391716....161725644.....3224773976
.1094..3672...93968..2315520...70863268...1922952988....56045462432
.3281.10220..389820.13124196..603245904..22903224024...981633748272
.9842.28472.1626348.74374784.5149743348.271600215464.17187870741644
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical for column k:
k=1: a(n) = 4*a(n-1) -3*a(n-2)
k=2: [order 9] for n>10
k=3: [order 14] for n>17
k=4: [order 43] for n>47
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>2
n=3: a(n) = 6*a(n-1) -2*a(n-2) -6*a(n-3) for n>4
n=4: a(n) = 8*a(n-1) -7*a(n-2) -9*a(n-3) -8*a(n-4) -12*a(n-5) +16*a(n-6) for n>7
n=5: [order 18] for n>19
n=6: [order 24] for n>26
n=7: [order 43] for n>45
EXAMPLE
Some solutions for n=4 k=4
..0..1..2..1. .0..1..0..2. .0..1..2..2. .0..1..2..1. .0..1..0..1
..2..1..2..0. .0..2..0..1. .0..1..0..0. .2..1..2..1. .0..1..0..1
..2..1..0..1. .0..1..0..2. .2..1..0..1. .2..1..0..0. .0..2..0..1
..2..0..2..1. .1..2..0..1. .0..1..2..1. .2..0..0..1. .2..2..0..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jul 21 2016
STATUS
approved