OFFSET
1,1
COMMENTS
Table starts
.2..3..4...5....6....7.....8.....9....10.....11.....12.....13......14......15
.2..4..6...9...12...16....20....25....30.....36.....42.....49......56......64
.2..5.12..22...38...64....98...145...210....291....394....526.....684.....876
.2..9.26..83..192..445...892..1752..3136...5494...9074..14716...22842...34868
.2.17.80.412.1558.5096.14826.39630.97184.223612.482160.991120.1946560.3679402
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..607
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: (order 39 symmetric)
EXAMPLE
Some solutions for n=4 k=4
.....3........2........1........3........2........3........3........2
....2.4......1.3......0.2......2.4......1.3......2.4......3.3......2.2
...2.3.4....1.2.3....0.1.2....1.4.4....1.1.4....2.3.4....2.3.4....2.2.2
..1.3.4.4..0.2.2.4..0.0.1.3..1.3.4.4..0.2.2.4..2.2.4.4..2.2.4.4..0.2.2.4
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Aug 05 2012
STATUS
approved