Number of circular permutations of length n without increasing or decreasing 3-sequences.
A165964
Number of circular permutations of length n without increasing or decreasing 3-sequences.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =4a(4) =16a(5) =86a(6) =542a(7) =3932a(8) =32330a(9) =297438a(10) =3028320a(11) =33814454a(12) =410954878a(13) =5400878692a(14) =76329470882
External references
- oeis: A165964