128648520domain: NAppears in sequencesE.g.f.: Series_Reversion( x + Sum_{n>=2} (-1)^(n-1) * x^(2*n-1)/(n*(n-1)) ) = Sum_{n>=1} a(n)*x^(2*n-1)/(2*n-1)!.at n=5A277413a(n) = Product_{d|n, d<n} A019565(A003714(d)), where A003714(n) is the n-th Fibbinary number.at n=55A300834