Smallest number k such that k^2 - 1 has exactly n distinct prime factors.
A219017
Smallest number k such that k^2 - 1 has exactly n distinct prime factors.
Terms
- a(0) =2a(1) =4a(2) =11a(3) =29a(4) =131a(5) =419a(6) =1429a(7) =14629a(8) =77141a(9) =509081a(10) =1456729a(11) =22486309a(12) =117048931a(13) =1625292241a(14) =10326137821a(15) =117440297701
External references
- oeis: A219017