Smallest composite number x such that sigma(x + prime(n)#) = sigma(x) + prime(n)#, where prime(n)# = A002110(n) and sigma is A000203.
A055009
Smallest composite number x such that sigma(x + prime(n)#) = sigma(x) + prime(n)#, where prime(n)# = A002110(n) and sigma is A000203.
Terms
- a(0) =434a(1) =104a(2) =44a(3) =176a(4) =2924a(5) =34256a(6) =83509a(7) =539081a(8) =254963216a(9) =14600541172a(10) =201346999808
External references
- oeis: A055009