Lucky numbers that are decimal concatenations of n with n + 7.

Terms

a(0) =613a(1) =1219a(2) =2835a(3) =3037a(4) =4653a(5) =5259a(6) =6471a(7) =7077a(8) =7279a(9) =7885a(10) =8289a(11) =8895a(12) =126133a(13) =148155a(14) =160167a(15) =166173a(16) =184191a(17) =198205a(18) =210217a(19) =226233a(20) =228235a(21) =268275a(22) =286293a(23) =298305a(24) =300307a(25) =306313a(26) =334341a(27) =346353a(28) =364371a(29) =376383