OFFSET
1,1
COMMENTS
Table starts
......4..........16...............64.................256..................1024
.....16.........256.............4096...............63248................974864
.....64........4096...........257984............14747432.............818683176
....256.......63248.........14747432..........2868497664..........531085813392
...1024......974864........818683176........531085813392.......322730734532144
...4096....14988504......44773333904......96355251717448....191717335254838000
..16384...230263568....2433605818736...17357082345304488.113048691194875930568
..65536..3535340280..131915396019176.3117995723618536688
.262144.54259841344.7141796191458336
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..71
FORMULA
Empirical for column k:
k=1: a(n) = 4*a(n-1).
k=2: [order 23 linear recurrence].
EXAMPLE
Some solutions for n=4 k=4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..1..1....0..0..1..2....0..0..1..0....0..0..1..0
..0..1..3..0....0..1..1..1....0..1..2..1....0..0..2..1....0..1..2..0
..1..1..3..2....3..2..0..0....2..2..0..0....1..2..0..0....0..2..2..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Sep 13 2013
STATUS
approved