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 A045657 #8 Sep 15 2019 19:57:28 %S A045657 0,0,0,0,0,80,384,2352,9856,42840,169360,676720,2631072,10265216, %T A045657 39779600,154498280,599565952,2330826752,9068429544,35332969392, %U A045657 137817174800,538204065336,2103971573264,8233197139552,32247054724768 %N A045657 Number of 2n-bead balanced binary strings, rotationally inequivalent to reverse, complement and reversed complement. %H A045657 Andrew Howroyd, <a href="/A045657/b045657.txt">Table of n, a(n) for n = 0..200</a> %F A045657 From _Andrew Howroyd_, Sep 15 2019: (Start) %F A045657 Inverse Moebius transform of A045666. %F A045657 a(n) = A000984(n) - A045653(n) - A045654(n) - A045655(n) + 2*A045656(n). (End) %Y A045657 Cf. A000984, A045653, A045654, A045655, A045656, A045666. %K A045657 nonn %O A045657 0,6 %A A045657 _David W. Wilson_