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 A083466 Smallest nontrivial multiple of n ending in n. By nontrivial one means a(n) is not equal to n or concatenation of n with itself. 1
 21, 12, 63, 24, 15, 36, 147, 48, 189, 110, 2211, 312, 2613, 714, 315, 416, 3417, 918, 3819, 120, 4221, 1122, 4623, 624, 125, 1326, 5427, 728, 5829, 330, 6231, 832, 6633, 1734, 735, 936, 7437, 1938, 7839, 240, 8241, 2142, 8643, 1144, 945 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MAPLE A083466 := proc(n)     ndgs := convert(n, base, 10) ;     for k from 2 do         if k*n <> digcat2(n, n) then             kdgs := convert(k*n, base, 10) ;             mtch := true ;             for i from 1 to nops(ndgs) do                 if op(i, ndgs) <> op(i, kdgs) then                     mtch := false;                     break;                 end if;             end do:             if mtch then                 return k*n ;             end if;         end if;     end do: end proc: # R. J. Mathar, Aug 23 2014 CROSSREFS Sequence in context: A166033 A228092 A071262 * A307312 A120742 A118296 Adjacent sequences:  A083463 A083464 A083465 * A083467 A083468 A083469 KEYWORD base,easy,nonn AUTHOR Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 02 2003 EXTENSIONS More terms from R. J. Mathar, Aug 23 2014 STATUS approved

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Last modified May 28 17:37 EDT 2020. Contains 334684 sequences. (Running on oeis4.)