186763domain: NPropertiesPrimalityPrimeyesAppears in sequencesExpansion of e.g.f. exp(A006351(x)).at n=7A217061Array read by downward antidiagonals: A(n,k) = A(n-1,k+1) + 2*(k+1)!*Sum_{j=0..k} A(n-1,j)/j! with A(0,k) = 1, n >= 0, k >= 0.at n=27A379458Prime numbersat n=16902