OFFSET
1,2
COMMENTS
Table starts
...1.....3......4.......5.........9........16........25.........39.........64
...3....17.....35......89.......323......1057......3027.......9257......29835
...4....35.....34......81.......809......1750......5071......29256......93170
...5....89.....81.....525......8262.....25663....148323....1480037....7361668
...9...323....809....8262....154939...1066148..11753249..164649556.1624261580
..16..1057...1750...25663...1066148..11211992.156829155.3678276863
..25..3027...5071..148323..11753249.156829155
..39..9257..29256.1480037.164649556
..64.29835..93170.7361668
.105.92561.300067
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..84
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1) +a(n-3) +a(n-4)
k=2: [order 18]
k=3: [order 78]
EXAMPLE
Some solutions for n=4 k=4
..0..0..0..1....2..1..0..0....1..0..0..1....1..0..0..0....1..1..2..0
..0..2..3..2....1..3..2..0....2..2..2..2....1..2..3..0....0..2..2..1
..1..1..2..1....2..0..3..1....1..3..3..1....2..2..2..0....0..3..2..2
..2..3..2..0....1..2..1..2....0..1..1..0....0..1..2..1....0..0..0..1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 20 2015
STATUS
approved