OFFSET
1,1
COMMENTS
Table starts
.....15.......56.........209...........780.............2911..............10864
.....56......392........2744.........19208...........134456.............941192
....209.....2744.......36016........472712..........6204344...........81431944
....780....19208......472712......11633448........286298344.........7045780240
...2911...134456.....6204344.....286298344......13211127617.......609622239024
..10864...941192....81431944....7045780240.....609622239024.....52746349035592
..40545..6588344..1068793208..173396103624...28130774228952...4563772381621072
.151316.46118408.14027896712.4267264603784.1298083303266168.394871276236514256
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..759
FORMULA
Empirical for column k:
k=1: a(n) = 4*a(n-1) -a(n-2)
k=2: a(n) = 7*a(n-1)
k=3: a(n) = 15*a(n-1) -24*a(n-2) -8*a(n-3)
k=4: a(n) = 27*a(n-1) -57*a(n-2) -46*a(n-3) +30*a(n-4)
k=5: [order 7]
k=6: [order 9]
k=7: [order 16]
EXAMPLE
Some solutions for n=3 k=4
..0..0..1..0..1....0..1..0..0..0....0..0..0..1..1....0..1..0..1..1
..0..0..0..1..1....0..1..1..1..0....0..1..0..0..0....0..1..0..0..0
..0..1..1..1..0....0..0..0..1..1....0..0..1..0..0....0..0..0..0..0
..0..0..1..1..0....1..1..0..0..1....1..0..1..0..1....0..1..0..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Nov 28 2014
STATUS
approved