Triangle read by rows: T(n,k) (n>=1, 0<=k<n) is the number of permutations of n elements with n-k elements in its connectivity set.
A263484
Triangle read by rows: T(n,k) (n>=1, 0<=k<n) is the number of permutations of n elements with n-k elements in its connectivity set.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =1a(7) =3a(8) =7a(9) =13a(10) =1a(11) =4a(12) =12a(13) =32a(14) =71a(15) =1a(16) =5a(17) =18a(18) =58a(19) =177a(20) =461a(21) =1a(22) =6a(23) =25a(24) =92a(25) =327a(26) =1142a(27) =3447a(28) =1a(29) =7
External references
- oeis: A263484