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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

Table of n, a(n) for n=1..45.

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.)