OFFSET
0,6
EXAMPLE
For n=3, signature([3]) = [1] is a subpartition of [3], signature([2,1]) = [1^2] is a subpartition of [2,1], but signature([1^3]) = [3] is not a subpartition of [1^3], so a(3)=1.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Franklin T. Adams-Watters, Apr 10 2006
STATUS
approved
