Number of nonprimes (1 and composites) in the reduced residue system of n-th primorial number (A002110).
A048863
Number of nonprimes (1 and composites) in the reduced residue system of n-th primorial number (A002110).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =142a(6) =2518a(7) =49836a(8) =1012859a(9) =24211838a(10) =721500294a(11) =22627459401a(12) =844130935668
External references
- oeis: A048863