OFFSET
1,1
COMMENTS
Table starts
....3.......7.........16...........38............90............212
....7......35........151..........684..........3140..........14357
...16.....151.......1312........11573........103021.........917629
...38.....684......11573.......203213.......3577618.......63110993
...90....3140.....103021......3577618.....125356095.....4404092335
..212...14357.....917629.....63110993....4404092335...309034856157
..500...65592....8183512...1115948342..155205128280.21764140662553
.1180..299916...73035143..19752407566.5477493001109
.2784.1371831..652120094.349830659344
.6568.6274812.5824185148
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..84
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1) +2*a(n-3)
k=2: [order 26]
EXAMPLE
Some solutions for n=3 k=4
..2..2..0..2....3..2..3..2....2..2..2..0....2..2..2..2....2..0..2..0
..2..2..2..0....3..1..2..1....2..0..2..2....2..0..2..2....2..2..2..2
..0..0..0..0....2..2..3..2....2..0..2..2....2..0..2..2....3..2..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Apr 04 2014
STATUS
approved