Smallest number k such that both k^n - 1 and k^n + 1 have n prime factors, counted with repetitions.
A385315
Smallest number k such that both k^n - 1 and k^n + 1 have n prime factors, counted with repetitions.
Terms
- a(0) =4a(1) =12a(2) =66a(3) =920a(4) =26a(5) =132a(6) =79a(7) =17958a(8) =53a(9) =693a(10) =4181a(11) =122160a(12) =29791a(13) =32318a(14) =971
External references
- oeis: A385315