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M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
Table of n, a(n) for n=1..20.
Sum mu(d)*A000920(n/d) where d|n.
Cf. A000400, A000920, A054721.
Sequence in context: A112002 A004033 A137891 * A000920 A052779 A254079
Adjacent sequences: A056268 A056269 A056270 * A056272 A056273 A056274
Marks R. Nester (nesterm(AT)dpi.qld.gov.au)