Triangle read by rows: T(n,k) is the number of permutations of [n] having k strong fixed blocks (see first comment for definition).
A186373
Triangle read by rows: T(n,k) is the number of permutations of [n] having k strong fixed blocks (see first comment for definition).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =3a(6) =3a(7) =14a(8) =9a(9) =1a(10) =77a(11) =38a(12) =5a(13) =497a(14) =198a(15) =25a(16) =3676a(17) =1229a(18) =134a(19) =1a(20) =30677a(21) =8819a(22) =815a(23) =9a(24) =285335a(25) =71825a(26) =5657a(27) =63a(28) =2928846a(29) =654985
External references
- oeis: A186373