Triangle T(n,k) of associated Stirling numbers of second kind, n >= 2, 1 <= k <= floor(n/2).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =10a(6) =1a(7) =25a(8) =15a(9) =1a(10) =56a(11) =105a(12) =1a(13) =119a(14) =490a(15) =105a(16) =1a(17) =246a(18) =1918a(19) =1260a(20) =1a(21) =501a(22) =6825a(23) =9450a(24) =945a(25) =1a(26) =1012a(27) =22935a(28) =56980a(29) =17325