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 A045625 #10 Apr 05 2017 11:28:36 %S A045625 1,2,1,4,7,18,29,70,126,266,507,1054,2037,4158,8183,16488,32760,65790, %T A045625 131026,262654,524265,1049524,2097119,4196350,8388450,16781292, %U A045625 33554367,67116784,134217657,268451838,536870247,1073774590,2147483520 %N A045625 Number of n-bead black-white reversible strings with fundamental period n. %F A045625 Moebius transform of A005418(n+1) (Christian Bower). %Y A045625 Column 2 of A284871. %K A045625 nonn %O A045625 0,2 %A A045625 _David W. Wilson_