Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k increasing cycles (0<=k<=n). A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) < b(2) < b(3) < ... .
A186754
Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k increasing cycles (0<=k<=n). A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) < b(2) < b(3) < ... .
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =1a(7) =1a(8) =3a(9) =1a(10) =5a(11) =5a(12) =7a(13) =6a(14) =1a(15) =23a(16) =36a(17) =25a(18) =25a(19) =10a(20) =1a(21) =129a(22) =234a(23) =166a(24) =110a(25) =65a(26) =15a(27) =1a(28) =894a(29) =1597
External references
- oeis: A186754