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 A066316 #6 Mar 30 2012 17:37:12 %S A066316 1,5,24,91,340,1224,4365,15521,55311,197964,712243,2577105,9375360, %T A066316 34284971,125977464,464938189,1722817415,6407307543,23909159417, %U A066316 89491715105,335908316844,1264097675775,4768430557020,18027183349395 %N A066316 Number of identity (asymmetric) bracelets (or necklaces) with n red and blue beads such that the beads switch colors when bracelet is turned over. %H A066316 <a href="/index/Br#bracelets">Index entries for sequences related to bracelets</a> %F A066316 a(n)=A022553(n)-A066315(n) %K A066316 nonn %O A066316 4,2 %A A066316 _Christian G. Bower_, Dec 13 2001