a(n) = number of 3-times (but not 4-times) reformable permutation of {1,...,n}.
A067950
a(n) = number of 3-times (but not 4-times) reformable permutation of {1,...,n}.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =8a(4) =31a(5) =56a(6) =219a(7) =605a(8) =2485a(9) =9697a(10) =40571
External references
- oeis: A067950