OFFSET
1,3
COMMENTS
Each string and its reverse are considered to be equivalent.
REFERENCES
M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2]
FORMULA
Sum mu(d)*A056310(n/d) where d|n.
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved