Superconducting triangular Nb wire networks with high normal-state resistanceare fabricated by using a negative tone hydrogen silsesquioxane (HSQ) resist.Robust magnetoresistance oscillations are observed up to high magnetic fieldsand maintained at low temperatures, due to the eective reduction of wiredimensions. Well-defined dips appear at integral and rational values (1/2, 1/3,1/4) of the reduced flux f = Phi/Phi_0, which is the first observation in thetriangular wire networks. These results are well consistent with theoreticalcalculations for the reduced critical temperature as a function of f.
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