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 A086100 #7 Apr 11 2023 08:39:50 %S A086100 0,0,1,0,11,10,11,0,111,110,111,100,111,110,111,0,1111,1110,1111,1100, %T A086100 1111,1110,1111,1000,1111,1110,1111,1100,1111,1110,1111,0,11111,11110, %U A086100 11111,11100,11111,11110,11111,11000,11111,11110,11111,11100 %N A086100 A086099 in binary. %C A086100 a(n) = A007088(A086099(n)). %o A086100 (PARI) a(n) = n++; (10^logint(n,2) - 10^valuation(n,2))/9; \\ _Kevin Ryde_, Apr 11 2023 %Y A086100 Cf. A086099, A007088. %K A086100 nonn,easy %O A086100 0,5 %A A086100 _Reinhard Zumkeller_, Jul 09 2003