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 A037414 #16 Apr 23 2021 22:16:22 %S A037414 1,9,81,82,90,729,730,738,739,810,811,819,6561,6562,6570,6571,6642, %T A037414 6643,6651,6652,7290,7291,7299,7300,7371,7372,7380,59049,59050,59058, %U A037414 59059,59130,59131,59139,59140,59778,59779,59787,59788,59859,59860,59868,59869 %N A037414 Positive numbers having the same set of digits in base 2 and base 9. %H A037414 John Cerkan, <a href="/A037414/b037414.txt">Table of n, a(n) for n = 1..10000</a> %o A037414 (PARI) isok(n) = Set(binary(n)) == Set(digits(n, 9)); \\ _Michel Marcus_, Jan 21 2017 %Y A037414 Subsequence of A033046. %K A037414 nonn,base %O A037414 1,2 %A A037414 _Clark Kimberling_ %E A037414 Name edited by _John Cerkan_, Jan 20 2017 %E A037414 a(28)-a(43) from _John Cerkan_, Jan 20 2017