Number of endofunctions f on [n] such that the number of cycles of f is a multiple of 3 for each size that is a multiple of 3.
A246951
Number of endofunctions f on [n] such that the number of cycles of f is a multiple of 3 for each size that is a multiple of 3.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =25a(4) =224a(5) =2625a(6) =37936a(7) =651553a(8) =12963840a(9) =293219361a(10) =7429984000a(11) =208486630121
External references
- oeis: A246951