OFFSET
1,2
COMMENTS
See A095029.
LINKS
Dan Gordon, List of Cyclic Difference Sets, (2003).
EXAMPLE
Using the numbers {1 3 4 5 9}, every number in the range 1..10 can be written as a difference modulo 11 in two different ways:
1=4-3=5-4, 2=3-1=5-3, 3=4-1=(1-9) mod 11, 4=5-1=9-5, 5=9-4=(3-9) mod 11,
6=9-2=(4-9) mod 11, 7=(1-5) mod 11=(5-9) mod 11, 8=9-1=(1-4) mod 11,
9=(1-3) mod 11=(3-5) mod 11, 10=(3-4) mod 11=(4-5) mod 11.
CROSSREFS
KEYWORD
fini,full,nonn
AUTHOR
Hugo Pfoertner, Jun 02 2004
STATUS
approved