This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A037422 #18 Apr 23 2021 22:18:49 %S A037422 1,2,10,20,102,122,201,210,211,212,1000,1011,1020,1021,1022,1121,1200, %T A037422 1211,1220,2000,2001,2010,2011,2012,2021,2022,2100,2110,2120,2201, %U A037422 2210,10002,10012,10020,10021,10022,10102,10122,10200,10210,10211 %N A037422 Positive numbers having the same set of digits in base 3 and base 10. %H A037422 John Cerkan, <a href="/A037422/b037422.txt">Table of n, a(n) for n = 1..10000</a> %t A037422 fQ[n_] := Union@ IntegerDigits@ n == Union@ IntegerDigits[n, 3]; Select[ Range@11000, fQ] (* _Robert G. Wilson v_, Feb 02 2017 *) %o A037422 (PARI) is(n)=Set(digits(n, 3))==Set(digits(n)) \\ _Charles R Greathouse IV_, Feb 11 2017 %Y A037422 Subsequence of A007089. %K A037422 nonn,base %O A037422 1,2 %A A037422 _Clark Kimberling_ %E A037422 Corrected by _Don Reble_, Apr 28 2006