Number of leading odd entries in all permutations of {1,2,...,n} (see example).

A152663

Number of leading odd entries in all permutations of {1,2,...,n} (see example).

Terms

    a(0) =1a(1) =1a(2) =6a(3) =16a(4) =120a(5) =540a(6) =5040a(7) =32256a(8) =362880a(9) =3024000a(10) =39916800a(11) =410572800a(12) =6227020800a(13) =76281004800

External references