189550849domain: NPropertiesPrimalityPrimeyesAppears in sequencesExpansion of E.g.f. exp(-x)/(1-3x).at n=8A000180Triangle read by rows: T(n, k) = n! * 3^k * hypergeom([-k], [-n], -1/3).at n=44A375446Prime numbersat n=10531896