a(n) is the smallest number k such that the symmetric representation of sigma(k) has n parts.
A239663
a(n) is the smallest number k such that the symmetric representation of sigma(k) has n parts.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =21a(4) =63a(5) =147a(6) =357a(7) =903a(8) =2499a(9) =6069a(10) =13915a(11) =29095a(12) =59455a(13) =142945a(14) =320045a(15) =643885a(16) =1367465a(17) =3287735a(18) =6779135a(19) =13853015a(20) =30262595a(21) =61773745
External references
- oeis: A239663