OFFSET
1,1
COMMENTS
Table starts
....4........20..........108...........465...........2265..........10920
....9.......141.........2089.........23841.........283641........3408145
...25......1685........95161.......3801496......180329601.....8793791605
...64.....16856......3232688.....406984645....64094922409.10425268139552
..169....183229....123067561...51140612201.29721673646857
..441...1926873...4487054905.6038706224797
.1156..20563180.165950022876
.3025.218090365
.7921
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) +2*a(n-2) -a(n-3)
k=2: a(n) = 8*a(n-1) +40*a(n-2) -119*a(n-3) -124*a(n-4) +240*a(n-5)
k=3: [order 15]
k=4: [order 82]
Empirical for row n:
n=1: [linear recurrence of order 22]
n=2: [order 28] for n>30
EXAMPLE
Some solutions for n=3 k=4
..0..8..6..7..4....0..1..8..6..7....0..8..9..3..4....0..1..6..9..8
..5..3..1..2.12....5..2..3..4.13....5..6..1.12..2....5..2..7..4..3
.10.11..9.16.18...10.11.15..9.18...10.11.18..7.17...10.17.12.13.14
.15.13.17.14.19...12.16.17.14.19...15.16.13.14.19...15.16.11.18.19
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 30 2015
STATUS
approved