Number of permutations on [n+3] with no circular 3-successions.
A284844
Number of permutations on [n+3] with no circular 3-successions.
Terms
- a(0) =16a(1) =70a(2) =384a(3) =2534a(4) =19424a(5) =169254a(6) =1650160a(7) =17784646a(8) =209855856a(9) =2689946246a(10) =37210700576a(11) =552433526310
External references
- oeis: A284844