a(n) = number of distinct prime divisors (taken together) of numbers of the form x^2+x+1 for x<=10^n.
A144850
a(n) = number of distinct prime divisors (taken together) of numbers of the form x^2+x+1 for x<=10^n.
Terms
- a(0) =8a(1) =74a(2) =734a(3) =7233a(4) =71653a(5) =712026a(6) =7090655a(7) =70686855a(8) =705173825a(9) =7038475146a(10) =70278276834a(11) =701910715473
External references
- oeis: A144850