OFFSET
1,2
COMMENTS
Table starts
.....1.........6...........12............31............89.............230
.....4.......134.........1992.........27650........343431.........3777963
....18......3035.......145151.......8296414.....479355276.....24453863816
....70.....69084.....14088801....3822509358.1035523589834.244734723702847
...292...1643235...1544467524.1954083613268
..1212..38562523.162168224979
..5028.903637375
.20832
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..40
FORMULA
Empirical for column k:
k=1: a(n) = 4*a(n-1) +2*a(n-3) +4*a(n-4) -8*a(n-5)
k=2: [order 84]
Empirical for row n:
n=1: a(n) = 4*a(n-1) -5*a(n-2) +2*a(n-3) -2*a(n-5) +3*a(n-6) -a(n-8) for n>9
EXAMPLE
Some solutions for n=3 k=4
..1..3..4..7..9....1..5..7..9.14....1..3..4..7..9....1..5..7..8..9
..6..0..5..2..8....6..0..2.12..4....6..0..5..2..8....6..0.12.13..3
.11.15.10.19.12...11.15..8..3.13...11.15.10.19.18...11.15..2.14..4
.16.17.18.13.14...17.10.16.19.18...17.12.16.13.14...17.10.19.16.18
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 22 2015
STATUS
approved