Numbers whose smallest decimal digit is 7.

Terms

a(0) =7a(1) =77a(2) =78a(3) =79a(4) =87a(5) =97a(6) =777a(7) =778a(8) =779a(9) =787a(10) =788a(11) =789a(12) =797a(13) =798a(14) =799a(15) =877a(16) =878a(17) =879a(18) =887a(19) =897a(20) =977a(21) =978a(22) =979a(23) =987a(24) =997a(25) =7777a(26) =7778a(27) =7779a(28) =7787a(29) =7788