Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} (or of any n-set) having k blocks of odd size (0<=k<=n).
A124321
Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} (or of any n-set) having k blocks of odd size (0<=k<=n).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =1a(6) =0a(7) =4a(8) =0a(9) =1a(10) =4a(11) =0a(12) =10a(13) =0a(14) =1a(15) =0a(16) =31a(17) =0a(18) =20a(19) =0a(20) =1a(21) =31a(22) =0a(23) =136a(24) =0a(25) =35a(26) =0a(27) =1a(28) =0a(29) =379
External references
- oeis: A124321