Numbers k such that 3 and 6 occur juxtaposed in the base-9 representation of k but not of k-1.

Terms

a(0) =33a(1) =57a(2) =114a(3) =138a(4) =195a(5) =219a(6) =276a(7) =297a(8) =357a(9) =381a(10) =438a(11) =462a(12) =513a(13) =543a(14) =600a(15) =624a(16) =681a(17) =705a(18) =762a(19) =786a(20) =843a(21) =867a(22) =924a(23) =948a(24) =1005a(25) =1026a(26) =1086a(27) =1110a(28) =1167a(29) =1191