Least multiple of n such that the n-th concatenation is a multiple of n. The (previous) (n-1)-th term is so chosen that the n-th term exists.

A090512

Least multiple of n such that the n-th concatenation is a multiple of n. The (previous) (n-1)-th term is so chosen that the n-th term exists.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =12a(4) =15a(5) =30a(6) =7a(7) =128a(8) =9a(9) =50a(10) =22a(11) =36a(12) =26a(13) =28a(14) =15a(15) =1232a(16) =85a(17) =414a(18) =19a(19) =500a(20) =84a(21) =462a(22) =69a(23) =120a(24) =200a(25) =364a(26) =81a(27) =532a(28) =29a(29) =810

External references