Numbers with the property that all pairs of consecutive digits differ by 9.

A198486

Numbers with the property that all pairs of consecutive digits differ by 9.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =90a(10) =909a(11) =9090a(12) =90909a(13) =909090a(14) =9090909a(15) =90909090a(16) =909090909a(17) =9090909090a(18) =90909090909a(19) =909090909090

External references