OFFSET
1,1
COMMENTS
Table starts
......6........18............60...............192...................624
.....18.......126...........918..............6642.................48114
.....60.......918.........15498............254694...............4232586
....192......6642........254694...........9640008.............367156350
....624.....48114.......4232586.........367156350...........32213930742
...2016....348462......70014654.......13964418774.........2819203560630
...6528...2523798....1160465118......531419938920.......247143798101322
..21120..18278946...19217863458....20220127602030.....21653415762483246
..68352.132387858..318374151654...769404277676466...1897735773641654046
.221184.958837662.5273531868834.29276398278326448.166300121937966179310
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..220
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1) +4*a(n-2)
k=2: a(n) = 6*a(n-1) +9*a(n-2)
k=3: [order 8]
k=4: [order 15]
k=5: [order 45]
k=6: [order 77]
EXAMPLE
Some solutions for n=3 k=4
..0..1..0..1....0..1..2..5....4..3..1..2....0..2..1..4....0..1..4..1
..1..4..1..4....1..2..5..4....3..4..2..1....1..4..2..1....1..0..1..4
..2..1..2..5....4..1..4..5....4..3..1..4....0..2..1..2....4..2..4..5
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Mar 18 2013
STATUS
approved