Sequence S such that 1 is in S and if x is in S, then 6x-1 and 6x+1 are in S.

Terms

a(0) =1a(1) =5a(2) =7a(3) =29a(4) =31a(5) =41a(6) =43a(7) =173a(8) =175a(9) =185a(10) =187a(11) =245a(12) =247a(13) =257a(14) =259a(15) =1037a(16) =1039a(17) =1049a(18) =1051a(19) =1109a(20) =1111a(21) =1121a(22) =1123a(23) =1469a(24) =1471a(25) =1481a(26) =1483a(27) =1541a(28) =1543a(29) =1553