OFFSET
1,9
COMMENTS
Table starts
.0....0........0............0...............0..................0
.0....0........0...........36.............216...............1260
.0....2......114.........2398...........35052.............552720
.0....8.....1384........76518.........3062214..........131421154
.0...30....16926......2593962.......281740616........33169633760
.0..108...212124.....89087722.....26096227960......8449174734112
.0..386..2647098...3045192312...2412390974650...2147475302085202
.0.1376.33046400.104165339046.223089594072370.545932535826768684
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..126
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = 4*a(n-1) -a(n-2) -2*a(n-3)
k=3: [order 7]
k=4: [order 21]
k=5: [order 68]
Empirical for row n:
n=1: a(n) = a(n-1)
n=2: a(n) = 6*a(n-1) -a(n-2) -12*a(n-3) +20*a(n-4) +24*a(n-5)
n=3: [order 16] for n>17
n=4: [order 57] for n>58
EXAMPLE
Some solutions for n=3 k=4
..0..1..1..0....0..1..1..1....0..1..1..0....0..0..1..0....0..2..1..2
..2..2..0..2....1..2..2..1....1..2..2..0....0..1..2..2....1..1..0..0
..1..0..1..2....1..0..0..1....0..1..0..1....1..2..0..1....0..0..2..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 20 2013
STATUS
approved