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 A023058 Numbers k such that k and 2k are anagrams of each other in base 3 (k is written here in base 3). 1
 1012, 10012, 10120, 10122, 10212, 100012, 100120, 100122, 100212, 101200, 101220, 101222, 102120, 102122, 102212, 1000012, 1000120, 1000122, 1000212, 1001200, 1001220, 1001222, 1002120, 1002122, 1002212, 1012000, 1012200, 1012220, 1012222 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS If a*10^m + b is a term, where b < 10^(m-1), then so is a*10^k+b for all k > m. - Robert Israel, Feb 21 2017 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 MAPLE f:= proc(n) local L, M; L:= convert(n, base, 3); M:= convert(2*n, base, 3); if sort(L) = sort(M) then add(L[i]*10^(i-1), i=1..nops(L)) else NULL fi end proc: map(f, [\$1..1000]); # Robert Israel, Feb 21 2017 CROSSREFS Sequence in context: A159774 A072140 A080467 * A223077 A206191 A249987 Adjacent sequences: A023055 A023056 A023057 * A023059 A023060 A023061 KEYWORD nonn,base AUTHOR David W. Wilson STATUS approved

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Last modified June 9 21:25 EDT 2023. Contains 363183 sequences. (Running on oeis4.)