OFFSET
1,2
COMMENTS
Table starts
..1....2.......2.........4............4.............8..............8
..2....8......19........76..........181...........741...........1779
..3...19......80.......570.........2574.........20764..........97348
..4...38.....262......3457........28654........443168........3980245
..7..114....1461.....33183.......484146......13490093......224906182
.10..251....5443....218658......5646644.....281488213.....8597299482
.15..612...24490...1851080.....88953626....8199368365...463717321235
.24.1656..117962..15760838...1357879302..225885684501.23104690637116
.35.3758..459193.110599613..17350066110.5291794810655
.54.9630.2147788.945852472.272318368893
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..111
FORMULA
Empirical for column k:
k=1: a(n) = a(n-2) +2*a(n-3)
k=2: [order 15]
Empirical for row n:
n=1: a(n) = 2*a(n-2)
n=2: a(n) = 12*a(n-2) -24*a(n-4) +31*a(n-6) -16*a(n-8)
n=3: [order 48] for n>51
EXAMPLE
Some solutions for n=4 k=4
..3..1..3..3....3..3..1..1....3..1..3..3....3..1..3..1....3..1..3..1
..3..1..3..2....3..2..1..2....3..1..0..0....3..2..0..1....2..2..2..0
..3..1..3..2....2..0..2..2....2..2..2..0....3..2..3..2....2..0..0..1
..2..2..2..0....3..1..0..0....3..1..0..0....2..2..3..3....3..3..0..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Apr 03 2014
STATUS
approved