Triangle read by rows, giving T(n,k) = number of k-member minimal ordered covers of a labeled n-set (1 <= k <= n).
A049055
Triangle read by rows, giving T(n,k) = number of k-member minimal ordered covers of a labeled n-set (1 <= k <= n).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =12a(5) =6a(6) =1a(7) =50a(8) =132a(9) =24a(10) =1a(11) =180a(12) =1830a(13) =1560a(14) =120a(15) =1a(16) =602a(17) =20460a(18) =60960a(19) =20520a(20) =720a(21) =1a(22) =1932a(23) =201726a(24) =1856400a(25) =2047920a(26) =302400a(27) =5040a(28) =1a(29) =6050
External references
- oeis: A049055