Odd composites (including 1 in the count) where the number 1 mod 4 equals the number 3 mod 4.

Terms

a(0) =26829a(1) =26845a(2) =26853a(3) =26857a(4) =26865a(5) =26869a(6) =26873a(7) =26877a(8) =26885a(9) =26889a(10) =26897a(11) =26917a(12) =616765a(13) =616773a(14) =616777a(15) =616785a(16) =616825a(17) =616833a(18) =616837a(19) =616845a(20) =616853a(21) =616857a(22) =616861a(23) =616865a(24) =616869a(25) =616873a(26) =616881a(27) =616885a(28) =616889a(29) =616893