OFFSET
1,1
COMMENTS
Table starts
......4........16...........60.............216................756
.....16.......108..........708............4476..............27684
.....60.......708.........9284..........115452............1399612
....216......4476.......115452.........2817548...........67134380
....756.....27684......1399612........67134380.........3159954052
...2592....168252.....16629436......1567933676.......145995171708
...8748...1008804....194596516.....36068275268......6648192704604
..29160...5983164...2249848972....819789099172....299224791093196
..96228..35170980..25758552060..18452018423420..13339889117822420
.314928.205214268.292530733516.411983259384452.590022908205332548
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..219
FORMULA
Empirical for column k:
k=1: a(n) = 6*a(n-1) -9*a(n-2)
k=2: a(n) = 10*a(n-1) -21*a(n-2) -20*a(n-3) -4*a(n-4) for n>5
k=3: [order 8] for n>9
k=4: [order 16] for n>17
k=5: [order 40] for n>41
EXAMPLE
Some solutions for n=3 k=4
..0..1..1..3. .0..0..2..2. .2..3..1..3. .1..3..1..1. .2..3..2..1
..0..1..3..1. .2..0..0..2. .2..3..1..3. .1..1..1..3. .2..2..3..3
..1..3..1..1. .2..0..2..0. .3..3..1..0. .0..3..1..3. .3..2..3..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 20 2016
STATUS
approved