A103776 Numbers n such that n and 8*n^2 + 4*n + 1 are primes.

2, 7, 11, 17, 41, 61, 101, 167, 227, 257, 281, 337, 347, 367, 397, 401, 461, 467, 487, 541, 571, 587, 601, 631, 641, 647, 661, 691, 701, 761, 857, 947, 971, 977, 997, 1021, 1087, 1237, 1277, 1291, 1381, 1451, 1481, 1607, 1621, 1627, 1667, 1697, 1787, 1811