Number of down-up permutations of n+5 starting with n+1.

A006214

Number of down-up permutations of n+5 starting with n+1.

Terms

    a(0) =0a(1) =5a(2) =32a(3) =178a(4) =1024a(5) =6320a(6) =42272a(7) =306448a(8) =2401024a(9) =20253440a(10) =183194912a(11) =1769901568a(12) =18198049024a(13) =198465167360

External references