OFFSET
1,2
COMMENTS
Table starts
.1....3...2......7.........19...........35.............77...............176
.1....7..12.....58........598.........4427..........26350............164148
.1...35..20....302......10310.......127492........1590691..........20375630
.1..176..54...4203.....624720.....14337385......454759923.......21604580859
.1..819.120..41919...27764427...1550545435...117167373425....15587739999833
.1.3927.284.406412.1354845965.162959704686.30258541759225.12768467508350730
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..143
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = 3*a(n-1) +7*a(n-2) +7*a(n-3) -a(n-4)
k=3: a(n) = 2*a(n-1) +2*a(n-2) -2*a(n-3) -2*a(n-4)
k=4: [order 10] for n>12
k=5: [order 37] for n>40
k=6: [order 85] for n>89
Empirical for row n:
n=1: a(n) = a(n-1) +a(n-2) +3*a(n-3) +a(n-4)
n=2: [order 26]
n=3: [order 94] for n>99
EXAMPLE
Some solutions for n=4 k=4
..1..0..3..0....0..3..1..1....0..2..3..0....1..0..2..0....0..3..3..0
..1..2..4..0....0..3..4..1....2..1..4..0....1..3..4..1....0..3..4..0
..2..2..4..0....0..4..1..2....0..4..2..0....0..3..0..1....0..4..2..1
..1..0..3..0....0..3..0..1....0..3..2..0....0..3..2..0....0..3..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 20 2015
STATUS
approved