Triangle with a(n,1) = n and a(n,k) = a(n,k-1) * a(n-1,k-1).

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =6a(5) =12a(6) =4a(7) =12a(8) =72a(9) =864a(10) =5a(11) =20a(12) =240a(13) =17280a(14) =14929920a(15) =6a(16) =30a(17) =600a(18) =144000a(19) =2488320000a(21) =7a(22) =42a(23) =1260a(24) =756000a(25) =108864000000a(28) =8a(29) =56