145288domain: NAppears in sequencesNumber of resistance values that can be constructed using exactly n 1-ohm resistors in series or parallel but not with fewer resistors.at n=14A051389O.g.f.: exp( Sum_{n>=1} A067692(n)*x^n/n ), where A067692(n) = [sigma(n)^2 + sigma(n,2)]/2.at n=18A180608