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 A045653 #8 Sep 15 2019 19:57:03
%S A045653 1,2,6,8,38,52,216,268,1062,1232,4956,5524,21848,24000,95780,102808,
%T A045653 410662,437548,1748592,1847524,7384988,7759144,31033404,32449828,
%U A045653 129774936,135207552,540807104,561629852,2246432996,2326762744,9306937416,9617286180,38468731942
%N A045653 Number of 2n-bead balanced binary strings, rotationally equivalent to reverse.
%H A045653 Andrew Howroyd, <a href="/A045653/b045653.txt">Table of n, a(n) for n = 0..1000</a>
%F A045653 Inverse Moebius transform of A045662. - _Andrew Howroyd_, Sep 15 2019
%o A045653 (PARI) c(n)={sumdiv(n,d, moebius(d)*d)} \\ A023900
%o A045653 a(n)={if(n<1, n==0, 2*sumdiv(n, d, c(n/d) * d * binomial(d-d%2, d\2)))} \\ _Andrew Howroyd_, Sep 15 2019
%Y A045653 Cf. A000984, A023900, A045662, A045654, A045655, A045656.
%K A045653 nonn
%O A045653 0,2
%A A045653 _David W. Wilson_
%E A045653 Terms a(30) and beyond from _Andrew Howroyd_, Sep 15 2019