Number T(n,k) of endofunctions on [n] with exactly k fixed points, none of which are isolated; triangle T(n,k), n >= 0, 0 <= k <= n/2, read by rows.
A350454
Number T(n,k) of endofunctions on [n] with exactly k fixed points, none of which are isolated; triangle T(n,k), n >= 0, 0 <= k <= n/2, read by rows.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =2a(4) =8a(5) =9a(6) =81a(7) =76a(8) =12a(9) =1024a(10) =875a(11) =180a(12) =15625a(13) =12606a(14) =2910a(15) =120a(16) =279936a(17) =217217a(18) =53550a(19) =3780a(20) =5764801a(21) =4348856a(22) =1118936a(23) =102480a(24) =1680a(25) =134217728a(26) =99111735a(27) =26280072a(28) =2817360a(29) =90720
External references
- oeis: A350454