Numbers k such that 2 and 6 occur juxtaposed in the base-10 representation of k but not of k+1.

Terms

a(0) =26a(1) =62a(2) =126a(3) =162a(4) =226a(5) =269a(6) =326a(7) =362a(8) =426a(9) =462a(10) =526a(11) =562a(12) =629a(13) =662a(14) =726a(15) =762a(16) =826a(17) =862a(18) =926a(19) =962a(20) =1026a(21) =1062a(22) =1126a(23) =1162a(24) =1226a(25) =1269a(26) =1326a(27) =1362a(28) =1426a(29) =1462