Divisible only by primes congruent to 2 mod 5.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =8a(5) =14a(6) =16a(7) =17a(8) =28a(9) =32a(10) =34a(11) =37a(12) =47a(13) =49a(14) =56a(15) =64a(16) =67a(17) =68a(18) =74a(19) =94a(20) =97a(21) =98a(22) =107a(23) =112a(24) =119a(25) =127a(26) =128a(27) =134a(28) =136a(29) =137