OFFSET
1,8
COMMENTS
Table starts
.0......0..........0.............0.................0...................0
.0......1..........4............18................80.................356
.0......2.........17...........204..............1989...............21141
.0.....14........330..........9741............275018.............7824415
.0.....56.......3666........270291..........20049229..........1487830718
.0....284......46289.......8971150........1762881313........343944986355
.0...1304.....560809.....280603511......145416104585......74591651561541
.0...6248....6883464....8946059000....12253138042478...16513537201433122
.0..29408...84161576..283436060320..1025207978301185.3631417278822015869
.0.139472.1030163755.8998418743638.85977721285058269
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..112
FORMULA
Empirical for column k:
k=2: a(n) = 4*a(n-1) +6*a(n-2) -12*a(n-3)
k=3: [order 11]
k=4: [order 44] for n>45
Empirical for row n:
n=2: a(n) = 4*a(n-1) +2*a(n-2)
n=3: [order 18]
n=4: [order 98]
EXAMPLE
Some solutions for n=4 k=4
..0..1..2..0. .0..1..2..0. .0..1..2..0. .0..1..2..0. .0..1..2..0
..2..1..1..1. .2..0..0..1. .2..2..0..1. .2..0..1..1. .2..2..1..1
..2..0..2..0. .0..1..0..2. .1..0..0..1. .0..1..2..0. .1..0..2..0
..1..2..1..0. .2..2..1..2. .2..1..2..2. .1..2..1..1. .2..0..1..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
_R. H. Hardin_, Oct 29 2016
STATUS
approved