Numbers in which 7 outnumbers all other digits together.

Terms

a(0) =7a(1) =77a(2) =177a(3) =277a(4) =377a(5) =477a(6) =577a(7) =677a(8) =707a(9) =717a(10) =727a(11) =737a(12) =747a(13) =757a(14) =767a(15) =770a(16) =771a(17) =772a(18) =773a(19) =774a(20) =775a(21) =776a(22) =777a(23) =778a(24) =779a(25) =787a(26) =797a(27) =877a(28) =977a(29) =1777