94782437domain: NPropertiesPrimalityPrimeyesAppears in sequencesIrregular triangle E(n,g) counting not necessarily connected 3-regular simple graphs on 2n vertices with girth exactly g.at n=31A185130Number of not necessarily connected 3-regular simple graphs on 2n vertices with girth exactly 3.at n=12A185133Prime numbersat n=5477757