Problem H-301. Find the number of labellings of the vertices of this unlabelled graph, using vertex labels {1,2,3,4,5}. Labellings that give the same abstract representation G=(V,E) count as the same, even if the drawings or label placement appear to be different. Problem H-301. Find the number of labellings of the vertices of this unlabelled graph, using vertex labels {1,2,3,4,5}. Labellings that give the same abstract representation G=(V,E) count as the same, even if the drawings or label placement appear to be different