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 A054155 #4 Mar 30 2012 16:48:45 %S A054155 1,3,4,7,7,14,14,25,34,55,79,144,225,396,697,1249,2251,4156,7686, %T A054155 14369,27029,51045,96910,184572,352705,675415,1296892,2494126,4806079, %U A054155 9273533,17920861,34670851,67159132,130218377,252745388,490988774 %N A054155 Inverse Moebius transform of A000029 (starting at term 0). %K A054155 nonn %O A054155 0,2 %A A054155 _N. J. A. Sloane_, Apr 29 2000