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 A054058 #7 Dec 23 2020 17:11:36 %S A054058 1,3,4,7,7,14,15,27,40,69,109,206,353,649,1192,2219,4117,7762,14603, %T A054058 27669,52506,99991,190747,364950,699259,1342539,2581468,4971721, %U A054058 9587581,18514054,35792569,69275887,134219908,260305295,505294149 %N A054058 Inverse Moebius transform of A000031 (starting at term 0). %Y A054058 Cf. A054079. %K A054058 nonn %O A054058 0,2 %A A054058 _N. J. A. Sloane_, Apr 29 2000