Number of permutations of n elements without cycles whose length is a multiple of 3.
A102736
Number of permutations of n elements without cycles whose length is a multiple of 3.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =16a(5) =80a(6) =400a(7) =2800a(8) =22400a(9) =179200a(10) =1792000a(11) =19712000a(12) =216832000a(13) =2818816000a(14) =39463424000a(15) =552487936000
External references
- oeis: A102736