Smallest multiple of n in which the most significant occurrence of the digit string of n is preceded and followed by the digit string of (n-1) and (n+1) as can be seen in the forward concatenation of the natural numbers.

A078294

Smallest multiple of n in which the most significant occurrence of the digit string of n is preceded and followed by the digit string of (n-1) and (n+1) as can be seen in the forward concatenation of the natural numbers.

Terms

    a(0) =12a(1) =1230a(2) =234a(3) =3452a(4) =4560a(5) =5670a(6) =6783a(7) =7896a(8) =8910a(9) =910110a(10) =101112a(11) =1112136a(12) =1213147a(13) =1314152a(14) =1415160a(15) =1516176a(16) =16171811a(17) =1718190a(18) =18192006a(19) =19202100a(20) =2021229a(21) =2122230a(22) =2223249a(23) =2324256a(24) =24252600a(25) =25262718a(26) =2627289a(27) =2728292a(28) =28293009a(29) =2930310

External references