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 A345392 a(n) is the least k > 1 such that n and k*n have the same set of decimal digits. 1
 2, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 101, 101, 87, 101, 77, 101, 101, 66, 101, 10, 101, 101, 14, 101, 9, 87, 101, 101, 101, 10, 43, 101, 101, 101, 101, 101, 101, 101, 87, 10, 101, 101, 8, 101, 99, 14, 101, 101, 101, 10, 101, 101, 101, 101, 101, 101, 101 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Rémy Sigrist, Table of n, a(n) for n = 0..10000 FORMULA a(n) = A345391(n) / n for any n > 0. a(n) = 2 for any n in A023086. PROG (PARI) a(n) = if (n==0, return (2)); { my (d=Set(digits(n))); forstep (m=2*n, oo, max(1, n), if (Set(digits(m))==d, return (m/n))) } (Python) def a(n): k, ss = 2, set(str(n)) while set(str(k*n)) != ss: k += 1 return k print([a(n) for n in range(58)]) # Michael S. Branicky, Jun 17 2021 CROSSREFS Cf. A023086, A345391. Sequence in context: A338049 A256665 A086862 * A027828 A106371 A145523 Adjacent sequences: A345389 A345390 A345391 * A345393 A345394 A345395 KEYWORD nonn,base AUTHOR Rémy Sigrist, Jun 17 2021 STATUS approved

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Last modified June 12 18:11 EDT 2024. Contains 373359 sequences. (Running on oeis4.)