OFFSET
1,1
COMMENTS
Table starts
...2........9............60...............570.................6960
...4.......81..........3600............324900.............48441600
...8......729........216000.........185193000.........337153536000
..15.....6084......12067722.......98956027822.....2213773305829075
..28....49284.....648144348....50740994294843.13958709698552890082
..51...386884...33600202086.25094770808231271
..92..2965284.1691726672094
.164.22268961
.290
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..48
FORMULA
Empirical for column k:
k=1: a(n) = 2*a(n-1) +a(n-2) -2*a(n-3) -a(n-4)
k=2: [order 15]
EXAMPLE
Some solutions for n=2 k=4
..2..3..1..1....3..1..4..3....0..1..0..3....4..0..0..4....0..2..4..3
..1..1..0..4....1..1..3..4....1..0..0..4....0..4..3..1....0..0..1..3
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 29 2016
STATUS
approved