a(n) = n concatenated with n 1's and n.

A075859

a(n) = n concatenated with n 1's and n.

Terms

    a(0) =111a(1) =2112a(2) =31113a(3) =411114a(4) =5111115a(5) =61111116a(6) =711111117a(7) =8111111118a(8) =91111111119

External references