Numbers whose base-7 representation contains exactly three 5's.

Terms

a(0) =285a(1) =628a(2) =971a(3) =1314a(4) =1657a(5) =1755a(6) =1804a(7) =1853a(8) =1902a(9) =1951a(10) =1965a(11) =1972a(12) =1979a(13) =1986a(14) =1993a(15) =1995a(16) =1996a(17) =1997a(18) =1998a(19) =1999a(20) =2001a(21) =2007a(22) =2049a(23) =2343a(24) =2686a(25) =3029a(26) =3372a(27) =3715a(28) =4058a(29) =4156