476626domain: NAppears in sequencesA triangle sequence related to the Eulerian numbers of the second kind: t(n,m) = Sum_{i=0..m}(-1)^(m-i)*binomial(n-i-1, m-i)*Stirling2(n+i+1, i+1).at n=39A156363Number of essentially parallel nonequivalent series-parallel networks with n elements and without unit elements in parallel.at n=22A339152