OFFSET
1,1
COMMENTS
Table starts
....3.......7..........16.............38................90..................212
....7......41.........218...........1187..............6524................35683
...16.....218........2739..........34344............432705..............5444993
...38....1187.......34344.........996325..........28827920............831472462
...90....6524......432705.......28827920........1916936295.........126785422189
..212...35683.....5444993......831472462......126785422189.......19230047618078
..500..194936....68414459....23966393838.....8374355016629.....2910650412464677
.1180.1065802...859450650...690533224800...552972642874139...440291290383709457
.2784.5827642.10797617215.19889264165241.36495962765384251.66567398078863767488
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..180
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1) +2*a(n-3)
k=2: [order 16]
k=3: [order 64]
EXAMPLE
Some solutions for n=3 k=4
..2..2..2..0....0..0..0..2....2..2..0..3....0..0..3..2....0..3..3..0
..0..0..0..0....0..2..2..2....2..0..0..2....0..3..1..0....0..3..1..0
..0..0..0..0....2..0..0..0....2..1..3..1....2..1..3..0....0..2..2..0
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Mar 09 2014
STATUS
approved