Product of primes == 1 (mod 7) and cubes of primes == 2 or 4 (mod 7).

Terms

a(0) =1a(1) =8a(2) =29a(3) =43a(4) =64a(5) =71a(6) =113a(7) =127a(8) =197a(9) =211a(10) =232a(11) =239a(12) =281a(13) =337a(14) =344a(15) =379a(16) =421a(17) =449a(18) =463a(19) =491a(20) =512a(21) =547a(22) =568a(23) =617a(24) =631a(25) =659a(26) =673a(27) =701a(28) =743a(29) =757