a(n) is the sum of the squares of the sizes of the conjugacy classes in the symmetric group A_n.
A206820
a(n) is the sum of the squares of the sizes of the conjugacy classes in the symmetric group A_n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =42a(4) =914a(5) =23694a(6) =1048542a(7) =45379878a(8) =3272115926a(9) =257662344206
External references
- oeis: A206820