Numbers having four 1's in base 6.

Terms

a(0) =259a(1) =1339a(2) =1519a(3) =1549a(4) =1554a(5) =1556a(6) =1557a(7) =1558a(8) =1559a(9) =1561a(10) =1567a(11) =1573a(12) =1579a(13) =1591a(14) =1627a(15) =1663a(16) =1699a(17) =1771a(18) =1987a(19) =2203a(20) =2419a(21) =2851a(22) =4147a(23) =5443a(24) =6739a(25) =7819a(26) =7999a(27) =8029a(28) =8034a(29) =8036