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 A037412 #16 Apr 23 2021 22:15:49 %S A037412 1,49,50,56,343,344,350,351,392,393,399,2401,2402,2408,2409,2450,2451, %T A037412 2457,2458,2744,2745,2751,2752,2793,2794,2800,16807,16808,16814,16815, %U A037412 16856,16857,16863,16864,17150,17151,17157,17158 %N A037412 Positive numbers having the same set of digits in base 2 and base 7. %H A037412 John Cerkan, <a href="/A037412/b037412.txt">Table of n, a(n) for n = 1..10000</a> %o A037412 (PARI) isok(n) = Set(digits(n, 2)) == Set(digits(n, 7)); \\ _John Cerkan_, Jan 13 2017 %Y A037412 Subset of A033044. %K A037412 nonn,base %O A037412 1,2 %A A037412 _Clark Kimberling_ %E A037412 Name edited by _John Cerkan_, Jan 14 2017