Numbers k such that string 6,4 occurs in the base 8 representation of k but not of k-1.

Terms

a(0) =52a(1) =116a(2) =180a(3) =244a(4) =308a(5) =372a(6) =416a(7) =436a(8) =500a(9) =564a(10) =628a(11) =692a(12) =756a(13) =820a(14) =884a(15) =928a(16) =948a(17) =1012a(18) =1076a(19) =1140a(20) =1204a(21) =1268a(22) =1332a(23) =1396a(24) =1440a(25) =1460a(26) =1524a(27) =1588a(28) =1652a(29) =1716