Numbers k such that string 5,5 occurs in the base 6 representation of k but not of k-1.

Terms

a(0) =35a(1) =71a(2) =107a(3) =143a(4) =179a(5) =210a(6) =251a(7) =287a(8) =323a(9) =359a(10) =395a(11) =426a(12) =467a(13) =503a(14) =539a(15) =575a(16) =611a(17) =642a(18) =683a(19) =719a(20) =755a(21) =791a(22) =827a(23) =858a(24) =899a(25) =935a(26) =971a(27) =1007a(28) =1043a(29) =1074