Number of non-unimodal permutations of n items (i.e., those which do not simply go up for the first part and then down for the rest, but at some point go down then up).

A059204

Number of non-unimodal permutations of n items (i.e., those which do not simply go up for the first part and then down for the rest, but at some point go down then up).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =2a(4) =16a(5) =104a(6) =688a(7) =4976a(8) =40192a(9) =362624a(10) =3628288a(11) =39915776a(12) =478999552a(13) =6227016704a(14) =87178283008

External references