The number of permutations of {n 1's, n 2's,...,n n's} with the property that b(1) >= b(2) >= ... >= b(n), where n k's are skipped by b(k) for k=1..n.
A332784
The number of permutations of {n 1's, n 2's,...,n n's} with the property that b(1) >= b(2) >= ... >= b(n), where n k's are skipped by b(k) for k=1..n.
Terms
- a(0) =5a(1) =18a(2) =110a(3) =508a(4) =4968a(5) =25824a(6) =305376a(7) =2375616a(8) =28316832a(9) =202354752a(10) =4771240704a(11) =33499830528a(12) =612464852736
External references
- oeis: A332784