If d,e are consecutive digits of n in base 11, then |d-e|>=5.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =10a(10) =17a(11) =18a(12) =19a(13) =20a(14) =21a(15) =29a(16) =30a(17) =31a(18) =32a(19) =41a(20) =42a(21) =43a(22) =53a(23) =54a(24) =55a(25) =65a(26) =66a(27) =67a(28) =77a(29) =78