OFFSET
1,1
COMMENTS
Table starts
........81.........442..........2464...........13720...........76404
.......442........3492.........27406..........216340.........1707838
......2464.......27406........313360.........3607280........42032622
.....13720......216340.......3607280........62377580......1099360056
.....76404.....1707838......42032622......1099360056.....29705776060
....424600....13499232.....489450096.....19356846358....800348545256
...2361716...106577620....5684197999....338611786558..21427121287833
..13136192...841345444...65906387212...5938320805688.575347045288652
..73071732..6643410412..766873371754.104483857316574
.406402784.52475002544.8913443952908
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..84
FORMULA
Empirical for column k:
k=1: [linear recurrence of order 19]
k=2: [order 59] for n>60
EXAMPLE
Some solutions for n=2 k=4
..0..2..0..0..1....1..1..0..0..2....0..0..1..0..2....0..0..2..2..0
..1..0..0..0..2....0..0..0..2..0....0..0..2..1..0....1..1..0..2..1
..1..1..2..0..2....1..0..0..2..1....0..1..1..2..1....0..1..2..1..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 30 2014
STATUS
approved