G.f.: A(x) = exp( Sum_{n>=1} 2*A179117(n)*x^n/n ), where A179117(n) = Sum_{d|n} phi(d^phi(d)).
A179116
G.f.: A(x) = exp( Sum_{n>=1} 2*A179117(n)*x^n/n ), where A179117(n) = Sum_{d|n} phi(d^phi(d)).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =21a(5) =236a(6) =470a(7) =29736a(8) =60343a(9) =199550a(10) =476302a(11) =4288159410a(12) =8582063896
External references
- oeis: A179116