Number of permutations of [n] with distinct cycle lengths such that each cycle contains exactly one cycle length different from its own as an element.
A364283
Number of permutations of [n] with distinct cycle lengths such that each cycle contains exactly one cycle length different from its own as an element.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =1a(4) =2a(5) =12a(6) =60a(7) =408a(8) =2640a(9) =24480a(10) =208080a(11) =2262960a(12) =23950080a(13) =307359360a(14) =3835641600a(15) =57400358400a(16) =825160089600
External references
- oeis: A364283