a(n) is the number of prime(1+n)-smooth numbers larger than one whose k-th arithmetic derivative is zero for some k.
A351072
a(n) is the number of prime(1+n)-smooth numbers larger than one whose k-th arithmetic derivative is zero for some k.
Terms
- a(0) =1a(1) =5a(2) =13a(3) =57a(4) =273a(5) =1747a(6) =12877a(7) =105366
External references
- oeis: A351072