Numbers that are unchanged when turned upside down, when written in a font in which 7 looks like upside-down 2.
A051791
Numbers that are unchanged when turned upside down, when written in a font in which 7 looks like upside-down 2.
Terms
- a(0) =0a(1) =1a(2) =8a(3) =11a(4) =27a(5) =69a(6) =72a(7) =88a(8) =96a(9) =101a(10) =111a(11) =181a(12) =207a(13) =217a(14) =287a(15) =609a(16) =619a(17) =689a(18) =702a(19) =712a(20) =782a(21) =808a(22) =818a(23) =888a(24) =906a(25) =916a(26) =986a(27) =1001a(28) =1111a(29) =1271
External references
- oeis: A051791