Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} in which the size of the last block is k, 1<=k<=n; the blocks are ordered with increasing least elements.
A124496
Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} in which the size of the last block is k, 1<=k<=n; the blocks are ordered with increasing least elements.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =1a(6) =9a(7) =4a(8) =1a(9) =1a(10) =31a(11) =14a(12) =5a(13) =1a(14) =1a(15) =121a(16) =54a(17) =20a(18) =6a(19) =1a(20) =1a(21) =523a(22) =233a(23) =85a(24) =27a(25) =7a(26) =1a(27) =1a(28) =2469a(29) =1101
External references
- oeis: A124496