OFFSET
1,2
COMMENTS
Table starts
.0........4..........24............108...............432................1620
.0.......96.........768...........6528.............49536..............360960
.0.....1152.......18048.........308544...........4744704............70371048
.0....11424......361728.......12548544.........394072704.........11985002256
.0...103488.....6712704......474091776.......30541426560.......1910809190712
.0...889056...118872576....17118725376.....2267772823680.....292321215814512
.0..7375872..2039727744...599456856000...163535201141376...43468685827935816
.0.59698464.34214296320.20531285093184.11544796423498368.6331185189881558208
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..161
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = 14*a(n-1) -49*a(n-2) for n>3
k=3: a(n) = 30*a(n-1) -237*a(n-2) +180*a(n-3) -36*a(n-4) for n>5
k=4: [order 6] for n>7
k=5: [order 20] for n>21
k=6: [order 42] for n>43
Empirical for row n:
n=1: a(n) = 6*a(n-1) -9*a(n-2)
n=2: a(n) = 10*a(n-1) -13*a(n-2) -60*a(n-3) -36*a(n-4)
n=3: [order 8]
n=4: [order 20]
n=5: [order 52] for n>53
EXAMPLE
Some solutions for n=3 k=4
..2..2..3..2. .2..2..2..3. .0..1..0..2. .0..0..0..2. .2..2..0..0
..0..2..0..2. .0..0..1..0. .1..1..3..0. .0..1..2..0. .0..0..2..3
..2..1..0..1. .0..1..0..1. .0..1..0..2. .0..0..0..0. .0..0..1..3
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 20 2016
STATUS
approved