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 A260028 #15 Jan 20 2025 00:47:58 %S A260028 8,1000,1111101000,1000010001110100000111001001000 %N A260028 Convert the last term from decimal to binary! a(1)=8. %o A260028 (PARI) a(n) = my(k=8); for(i=2, n, k=fromdigits(binary(k))); k; \\ _Jinyuan Wang_, Jan 18 2025 %Y A260028 For initial terms 2 through 12 see A008559, A006938, A260025, A260024, A260026, A260027, A260028, A260029, A008559 (again), A006938 (again), A260030 respectively. %K A260028 nonn,base %O A260028 1,1 %A A260028 _N. J. A. Sloane_, Jul 14 2015