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 A050188 #4 Mar 30 2012 18:57:01 %S A050188 0,4,10,18,35,56,81,120,165,216,286,364,450,560,680,810,969,1140,1323, %T A050188 1540,1771,2016,2300,2600,2916,3276,3654,4050,4495,4960,5445,5984, %U A050188 6545,7128,7770,8436,9126,9880,10660,11466,12341,13244,14175 %N A050188 T(n,3), array T as in A050186; a count of aperiodic binary words. %Y A050188 T(n, 3)=n*A001840(n). %K A050188 nonn %O A050188 3,2 %A A050188 _Clark Kimberling_