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 A260027 #10 Jan 18 2025 16:35:19 %S A260027 7,111,1101111,100001100110100110111, %T A260027 1010110101111001011010001101011100010111010110010110001101100011111 %N A260027 Convert the last term from decimal to binary! a(1)=7. %Y A260027 For initial terms 2 through 12 see A008559, A006938, A260025, A260024, A260026, A260027, A260028, A260029, A008559 (again), A006938 (again), A260030 respectively. %K A260027 nonn,base %O A260027 1,1 %A A260027 _N. J. A. Sloane_, Jul 14 2015