OFFSET
1,4
COMMENTS
Table starts
...0.....1......2........6.........16..........40............96.............224
...1.....4.....20.......84........324........1188..........4212...........14580
...2....20....140......863.......4962.......27313........145932..........763031
...6....84....863.....7940......68790......573342.......4651079........36985536
..16...324...4962....68790.....903332....11451686.....141595454......1718447506
..40..1188..27313...573342...11451686...221410052....4182294415.....77626332302
..96..4212.145932..4651079..141595454..4182294415..120864516084...3435347473308
.224.14580.763031.36985536.1718447506.77626332302.3435347473308.149656305350148
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..420
FORMULA
Empirical for column k:
k=1: a(n) = 4*a(n-1) - 4*a(n-2) for n > 4.
k=2: a(n) = 6*a(n-1) - 9*a(n-2) for n > 3.
k=3: a(n) = 10*a(n-1) - 29*a(n-2) + 20*a(n-3) - 4*a(n-4).
k=4: [order 6] for n > 7.
k=5: [order 10].
k=6: [order 14] for n > 15.
k=7: [order 26].
k=8: [order 38] for n > 39.
EXAMPLE
Some solutions for n=3, k=4:
0 1 0 2 0 1 0 2 0 1 0 2 0 1 0 2 0 1 0 2
2 1 2 1 2 1 2 0 2 2 1 0 1 0 2 1 1 0 2 0
0 2 1 2 1 2 1 2 0 1 2 1 2 0 1 0 1 2 0 2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Sep 24 2013
STATUS
approved