Triangle read by rows of the numbers T(n,k) (n > 1, 0 < k < n) of set partitions of n of length k which do not have a proper subset of parts with a union equal to a subset {1,2,...,j} with j < n.
A087903
Triangle read by rows of the numbers T(n,k) (n > 1, 0 < k < n) of set partitions of n of length k which do not have a proper subset of parts with a union equal to a subset {1,2,...,j} with j < n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =1a(7) =11a(8) =9a(9) =1a(10) =1a(11) =26a(12) =48a(13) =16a(14) =1a(15) =1a(16) =57a(17) =202a(18) =140a(19) =25a(20) =1a(21) =1a(22) =120a(23) =747a(24) =916a(25) =325a(26) =36a(27) =1a(28) =1a(29) =247
External references
- oeis: A087903