Triangle read by rows: S_D(n,k) = `Type D' Stirling numbers of the second kind.

Terms

a(0) =1a(1) =2a(2) =2a(3) =2a(4) =9a(5) =4a(6) =2a(7) =27a(8) =36a(9) =10a(10) =2a(11) =65a(12) =195a(13) =140a(14) =26a(15) =2a(16) =143a(17) =840a(18) =1180a(19) =540a(20) =76a(21) =2a(22) =301a(23) =3171a(24) =7735a(25) =6510a(26) =2142a(27) =232a(28) =2a(29) =619