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%I #17 Apr 23 2021 22:18:28
%S 1,2,9,18,81,82,83,90,99,162,163,164,171,180,729,730,731,738,739,740,
%T 747,748,749,810,811,812,819,828,891,892,893,900,909,1458,1459,1460,
%U 1467,1468,1469,1476,1477,1478,1539,1540,1541,1548,1557,1620,1621
%N Positive numbers having the same set of digits in base 3 and base 9.
%H John Cerkan, <a href="/A037421/b037421.txt">Table of n, a(n) for n = 1..10000</a>
%o (PARI) is(n)=Set(digits(n, 3))==Set(digits(n, 9)) \\ _Charles R Greathouse IV_, Feb 11 2017
%K nonn,base
%O 1,2
%A _Clark Kimberling_
%E Corrected by _Don Reble_, Apr 28 2006
%E Name edited by _John Cerkan_, Jan 25 2017
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