Number of permutations of [n] having at least one repeated cycle length.
A351901
Number of permutations of [n] having at least one repeated cycle length.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =10a(5) =46a(6) =246a(7) =1926a(8) =16080a(9) =143424a(10) =1397520a(11) =16163280a(12) =190902240a(13) =2534113440a(14) =35501044320a(15) =531674569440
External references
- oeis: A351901