OFFSET
1,1
COMMENTS
Table starts
.2....3....4.....5......6......7.......8.......9.......10.....11...12.13.14
.2....5....8....13.....18.....25......32......41.......50.....61...72.85
.2...15...38....79....152....263.....418.....643......942...1329.1832
.2...93..344..1181...3198...7801...16752...33605....62766.111653
.2.1007.5360.35567.155102.562559.1786114.4984385.12779966
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..85
FORMULA
Empirical for row n:
n=1: a(k)=2*a(k-1)-a(k-2)
n=2: a(k)=2*a(k-1)-2*a(k-3)+a(k-4)
n=3: a(k)=2*a(k-1)-3*a(k-4)+3*a(k-6)-2*a(k-9)+a(k-10)
n=4: (symmetric, order 30)
EXAMPLE
Some solutions for n=4 k=4
.....3........2........3........3........1........1........2........2
....2.4......2.2......2.4......3.3......2.0......0.2......2.2......2.2
...2.3.4....2.3.1....2.3.4....3.3.3....2.1.0....0.2.1....3.1.2....3.0.3
..3.2.3.4..1.3.0.4..3.2.4.3..4.3.1.4..2.1.1.0..1.0.2.1..3.1.1.3..3.0.3.2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Jul 20 2012
STATUS
approved