Number of permutations of n distinct letters (ABCD...) each of which appears thrice with n-3 fixed points.

A124007

Number of permutations of n distinct letters (ABCD...) each of which appears thrice with n-3 fixed points.

Terms

    a(0) =0a(1) =0a(2) =54a(3) =216a(4) =540a(5) =1080a(6) =1890a(7) =3024a(8) =4536a(9) =6480a(10) =8910a(11) =11880a(12) =15444a(13) =19656a(14) =24570

External references