Numbers k such that k concatenated with k+9 is a lucky number.

Terms

a(0) =2a(1) =6a(2) =18a(3) =26a(4) =30a(5) =38a(6) =42a(7) =54a(8) =62a(9) =80a(10) =84a(11) =98a(12) =126a(13) =132a(14) =158a(15) =168a(16) =212a(17) =222a(18) =240a(19) =242a(20) =258a(21) =278a(22) =288a(23) =296a(24) =306a(25) =312a(26) =314a(27) =350a(28) =368a(29) =384