Concatenation of all numbers less than or equal to n other than the phi(n) numbers relatively prime to n.

A061098

Concatenation of all numbers less than or equal to n other than the phi(n) numbers relatively prime to n.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =24a(4) =5a(5) =2346a(6) =7a(7) =2468a(8) =369a(9) =2456810a(10) =11a(11) =2346891012a(12) =13a(13) =24678101214a(14) =3569101215a(15) =246810121416a(16) =17a(18) =19a(22) =23a(24) =510152025

External references