OFFSET
1,3
COMMENTS
Table starts
...1...1...1...1...1...1...1...1...1...1...1...1...1...1...1...1...1...1...1
...2...2...2...2...2...2...2...2...2...2...2...2...2...2...2...2...2...2...2
...3...6...6...6...6...6...6...6...6...6...6...6...6...6...6...6...6...6...6
...5..14..24..24..24..24..24..24..24..24..24..24..24..24..24..24..24..24..24
...8..31..78.120.120.120.120.120.120.120.120.120.120.120.120.120.120.120.120
..11..34..60..72.144.144.144.144.144.144.144.144.144.144.144.144.144.144.144
..17..39..50..54..60.108.108.108.108.108.108.108.108.108.108.108.108.108.108
..25..46..52..54..54..60.108.108.108.108.108.108.108.108.108.108.108.108.108
..37..64..70..72..72..72..81.144.144.144.144.144.144.144.144.144.144.144.144
..57.104.116.120.120.120.120.147.240.240.240.240.240.240.240.240.240.240.240
..84.161.184.192.192.192.192.192.228.384.384.384.384.384.384.384.384.384.384
.127.249.292.308.308.308.308.308.308.368.616.616.616.616.616.616.616.616.616
.191.385.449.480.480.480.480.480.480.480.576.960.960.960.960.960.960.960.960
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..618
FORMULA
Empirical for column k:
k=1: a(n) = a(n-1) +a(n-3) -a(n-4) +2*a(n-5) -a(n-6) +a(n-7)
k=2: a(n) = a(n-1) +a(n-3) -a(n-4) +2*a(n-5) -a(n-6) +a(n-7) for n>18
k=3: a(n) = a(n-1) +a(n-3) -a(n-4) +2*a(n-5) -a(n-6) +a(n-7) for n>18
k=4: a(n) = a(n-1) +a(n-3) -a(n-4) +2*a(n-5) -a(n-6) +a(n-7) for n>18
k=5: a(n) = a(n-1) +a(n-3) -a(n-4) +2*a(n-5) -a(n-6) +a(n-7) for n>18
k=6: a(n) = a(n-1) +a(n-3) -a(n-4) +2*a(n-5) -a(n-6) +a(n-7) for n>18
k=7: a(n) = a(n-1) +a(n-3) -a(n-4) +2*a(n-5) -a(n-6) +a(n-7) for n>18
EXAMPLE
Some solutions for n=7 k=4
..0....0....1....0....0....0....0....3....1....0....0....0....0....1....1....0
..1....1....0....1....4....1....1....0....0....1....2....1....1....0....0....1
..3....3....3....2....1....3....2....1....3....3....1....2....3....4....4....4
..4....2....4....3....3....4....4....4....2....2....4....3....2....2....3....2
..2....5....2....5....5....5....5....2....4....4....3....4....4....3....2....3
..5....4....5....6....2....6....3....5....5....5....5....5....6....5....5....5
..6....6....6....4....6....2....6....6....6....6....6....6....5....6....6....6
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 24 2015
STATUS
approved