OFFSET
1,5
COMMENTS
Table starts
.0.....0.......1........3.........12..........40...........120............336
.0.....6......40......122........488........1608..........5392..........17368
.0....39.....244.....1109.......6031.......28448........136778.........633328
.0...202....1496....10227......77620......535671.......3723370.......25022190
.0...925....8800....89331.....960325.....9722206......98015235......960209886
.0..3924...50084...747299...11485716...170405645....2495874984....35693194243
.0.15795..277996..6049298..133784624..2902520386...61836040854..1290897457785
.0.61182.1513104.47723226.1525870912.48303362606.1498317588826.45634751291449
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..287
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1)
k=2: a(n) = 9*a(n-1) - 27*a(n-2) + 27*a(n-3) for n > 5
k=3: a(n) = 15*a(n-1) - 81*a(n-2) + 185*a(n-3) - 162*a(n-4) + 60*a(n-5) - 8*a(n-6) for n > 7.
k=4: [order 6] for n > 9.
k=5: [order 18] for n > 20.
k=6: [order 27] for n > 30.
k=7: [order 57] for n > 60.
Empirical for row n:
n=1: a(n) = 6*a(n-1) - 12*a(n-2) + 8*a(n-3) for n > 6.
n=2: a(n) = 6*a(n-1) - 6*a(n-2) - 16*a(n-3) + 12*a(n-4) + 24*a(n-5) + 8*a(n-6).
n=3: [order 9] for n > 12.
n=4: [order 18] for n > 21.
n=5: [order 30] for n > 33.
n=6: [order 69] for n > 72.
EXAMPLE
Some solutions for n=3, k=4:
0 1 0 2 0 1 0 1 0 1 0 2 0 1 0 0 0 1 1 2
2 1 0 2 2 1 0 1 2 2 0 1 0 2 1 2 0 1 0 2
2 1 2 0 1 2 0 1 1 1 0 1 0 2 1 0 0 1 0 1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Sep 27 2013
STATUS
approved