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A345391 a(n) is the least proper multiple of n with the same set of decimal digits as n.

%I A345391 #8 Jun 21 2021 03:05:30
%S A345391 11,22,33,44,55,66,77,88,99,100,1111,1212,1131,1414,1155,1616,1717,
%T A345391 1188,1919,200,2121,2222,322,2424,225,2262,2727,2828,2929,300,1333,
%U A345391 3232,3333,3434,3535,3636,3737,3838,3393,400,4141,4242,344,4444,4455,644,4747
%N A345391 a(n) is the least proper multiple of n with the same set of decimal digits as n.
%H A345391 Rémy Sigrist, <a href="/A345391/b345391.txt">Table of n, a(n) for n = 1..10000</a>
%F A345391 a(n) <= A020338(n) for any n > 0.
%o A345391 (PARI) a(n) = { my (d=Set(digits(n))); forstep (m=2*n, oo, n, if (Set(digits(m))==d, return (m))) }
%o A345391 (Python)
%o A345391 def a(n):
%o A345391     kn, ss = 2*n, set(str(n))
%o A345391     while set(str(kn)) != ss: kn += n
%o A345391     return kn
%o A345391 print([a(n) for n in range(1, 49)]) # _Michael S. Branicky_, Jun 17 2021
%Y A345391 Cf. A020338, A029793, A276769.
%K A345391 nonn,base,easy
%O A345391 1,1
%A A345391 _Rémy Sigrist_, Jun 17 2021