OFFSET
1,4
COMMENTS
Table starts
...1......1..........3.............8................21...................55
...1......9.........64...........439..............2992................20382
...3.....64.......1205.........21770............393408..............7103846
...8....439......21770.......1043604..........49913988...........2386203232
..21...2992.....393408......49913988........6320545103.........800089656653
..55..20382....7103846....2386203232......800089656653......268201160539247
.144.138852..128269829..114066364087...101271407955316....89898324366354186
.377.945923.2316065437.5452552422721.12818259615003968.30132701233909614426
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..112
FORMULA
Empirical for column k:
k=1: a(n) = 3*a(n-1) -a(n-2) for n>3
k=2: a(n) = 9*a(n-1) -16*a(n-2) +11*a(n-3) -27*a(n-4) +21*a(n-5) -4*a(n-6)
k=3: [order 36] for n>37
EXAMPLE
Some solutions for n=3 k=4
..0..1..1..1....0..0..1..2....0..2..1..1....0..1..1..1....0..2..0..0
..0..2..1..2....1..2..0..1....2..2..1..2....2..2..0..0....2..2..1..2
..1..0..0..0....2..2..2..0....0..1..1..1....2..2..1..2....2..0..1..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Nov 14 2013
STATUS
approved