OFFSET
1,1
COMMENTS
Table starts
.....6.......16........76..........314...........1170.............4584
....16......242.......724........10534..........28128...........419878
....76......724......8374........85196.........854206..........8838040
...314....10534.....85196......3160834.......22328204........859128648
..1170....28128....854206.....22328204......584293702......15744800360
..4584...419878...8838040....859128648....15744800360....1576885946694
.18208..1144652..91616256...6209914254...421312592376...29418861515276
.71242.16946918.944382122.235891268252.11212196319546.2914693904795344
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..143
FORMULA
Empirical for column k:
k=1: a(n) = 3*a(n-1) +14*a(n-3) +a(n-4) -a(n-5)
k=2: [order 16]
k=3: [order 30]
k=4: [order 70]
EXAMPLE
Some solutions for n=2 k=4
..x..0..x..3..x..3..x....x..0..x..0..x..0..x....x..0..x..2..x..2..x
..1..x..3..x..0..x..0....3..x..1..x..3..x..1....0..x..1..x..3..x..1
..x..2..x..3..x..1..x....x..0..x..2..x..2..x....x..1..x..0..x..2..x
..3..x..1..x..0..x..2....3..x..3..x..1..x..1....2..x..0..x..3..x..1
..x..0..x..3..x..3..x....x..2..x..0..x..0..x....x..3..x..2..x..2..x
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Nov 03 2013
STATUS
approved