20415995028domain: NAppears in sequencesStirling numbers of second kind S2(17,n).at n=7A011566Stirling numbers of second kind: 8th column of Stirling2 triangle A008277.at n=9A049434a(n) = Stirling2(2*n+1, n).at n=7A247238a(n) = Stirling2(n, floor(n/2)).at n=17A343279