Number of arrangements of n 1's, n 2's, ..., n n's avoiding equal consecutive terms and introduced in ascending order.
A321666
Number of arrangements of n 1's, n 2's, ..., n n's avoiding equal consecutive terms and introduced in ascending order.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =29a(4) =94376a(5) =66218360625
External references
- oeis: A321666