Numbers k such that k + k'*2 is equal to a partial sum of primorial numbers (a term of A143293), where k' stands for the arithmetic derivative of k, A003415.
A369061
Numbers k such that k + k'*2 is equal to a partial sum of primorial numbers (a term of A143293), where k' stands for the arithmetic derivative of k, A003415.
Terms
- a(0) =1a(1) =7a(2) =37a(3) =99a(4) =2557a(5) =32587a(6) =543097a(7) =10242787a(8) =232889539a(9) =146710424885a(10) =207263519017
External references
- oeis: A369061