OFFSET
1,3
COMMENTS
Found by counting homomorphisms to the symmetric group.
EXAMPLE
The 4 subgroups of the braid group on 3 strands of index 3 are the 3 stabilizers of one strand and the subgroup of words of total weight divisible by 3.
CROSSREFS
KEYWORD
nonn,nice,more
AUTHOR
Douglas Zare, May 30 2001
STATUS
approved