OFFSET
1,2
COMMENTS
Table starts
.1......3..........7.............15.................33.....................73
.1.....15.........97............587...............3615..................22387
.1.....73.......1313..........20563.............336079................5546705
.1....355......17759.........718483...........31119789.............1370434057
.1...1727.....240241.......25116353.........2885285507...........339565321435
.1...8401....3249889......877968487.......267483142619.........84130295708483
.1..40867...43963319....30690409685.....24797475083765......20843967523877175
.1.198799..594719777..1072818688305...2298890419506403....5164265865545602229
.1.967065.8045152705.37501616113029.213122398219612007.1279489656786836660869
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..199
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = 4*a(n-1) +4*a(n-2) +a(n-3)
k=3: a(n) = 12*a(n-1) +20*a(n-2) +9*a(n-3)
k=4: [order 10]
k=5: [order 13] for n>14
k=6: [order 37] for n>38
Empirical for row n:
n=1: a(n) = 2*a(n-1) +a(n-3)
n=2: [order 9]
n=3: [order 31]
EXAMPLE
Some solutions for n=3 k=4
..2..2..2..1....2..1..2..2....0..1..0..1....2..2..2..2....1..2..1..0
..2..1..0..0....1..2..2..1....2..2..2..0....1..1..2..0....2..0..2..2
..0..0..1..2....1..0..2..2....2..2..1..2....2..2..1..2....2..2..1..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Nov 22 2013
STATUS
approved