a(n) is the smallest even number k such that the symmetric representation of sigma(k) has n parts.
A320521
a(n) is the smallest even number k such that the symmetric representation of sigma(k) has n parts.
Terms
- a(0) =2a(1) =10a(2) =50a(3) =230a(4) =1150a(5) =5050a(6) =22310a(7) =106030a(8) =510050a(9) =2065450a(10) =10236350
External references
- oeis: A320521