A068209 Considering the congruence (x+1)^p-x^p=1 (mod p^2) sequence gives values of p of the form 3k-1 such there exist nontrivial solutions (x other than 0 or -1 modulo p).

59, 83, 179, 227, 419, 443, 701, 857, 887, 911, 929, 971, 977, 1091, 1109, 1193, 1217, 1223, 1259, 1283, 1289, 1439, 1487, 1493, 1613, 1637, 1811, 1847, 1901, 1997, 2003, 2087, 2243, 2423, 2477, 2579, 2591, 2729, 2777, 2969, 3089, 3137, 3191, 3203, 3251