OFFSET
1,1
COMMENTS
Table starts
....2......2.........4............4.............8..............8.............16
....4.....10........38...........90...........366............878...........3606
...10.....44.......330.........1494.........12234..........57722.........477574
...22....148......2066........17550........279886........2545618.......41758418
...50....636.....16994.......281186.......8802558......157432290.....5145703760
..114...2430....116030......3502886.....207932244.....7149227810...457988195982
..258...9648....884792.....52375114....6169009514...422227556156.54164128056204
..586..37946...6273952....672652728..148090588518.19320096061230
.1330.149336..46648918...9771038498.4275011910288
.3018.588102.335571098.127878632630
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..97
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1) +2*a(n-2) +2*a(n-3)
k=2: [order 14] for n>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>50
EXAMPLE
Some solutions for n=4 k=4
..1..3..1..3....3..1..1..3....3..1..3..1....3..1..3..1....1..3..1..3
..1..3..1..3....3..0..2..0....3..1..2..1....3..0..2..0....1..2..2..2
..1..2..1..1....3..2..0..2....3..2..2..2....1..0..0..0....1..2..0..0
..3..0..0..2....2..0..0..0....1..0..0..0....2..0..1..2....2..3..2..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Apr 04 2014
STATUS
approved