OFFSET
1,1
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
a(n) = Sum_{d|n} mu(d)*A056450(n/d).
PROG
(PARI) a(n) = sumdiv(n, d, moebius(d)*(3*2^(n/d)-(-2)^(n/d))/2);
for(n=1, 40, print1(a(n), ", ")); \\ Petros Hadjicostas, Apr 24 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Petros Hadjicostas, Apr 24 2020
STATUS
approved