Numbers n such that the Eisenstein integer (1-w)^n - 1 has prime norm, where w = - 1/2 + sqrt(-3)/2.
2, 5, 7, 11, 17, 19, 79, 163, 193, 239, 317, 353, 659, 709, 1049, 1103, 1759, 2029
1 seqfan posts
Thu Nov 26 00:33:27 CET 2009 [seqfan] Primes p = nk-1 dividing Fibonacci( k )