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 A066314 #6 Mar 30 2012 17:37:12 %S A066314 1,0,1,1,3,3,9,12,28,42,93,154,315,549,1091,1980,3855,7140,13797, %T A066314 25941,49929,94767,182361,348430,671088,1288350,2485504,4789134, %U A066314 9256395,17886951,34636833,67091520,130150493,252610440,490853403 %N A066314 Number of identity (asymmetric) bracelets (or necklaces) with n red or blue beads such that the beads switch colors when bracelet is turned over. %H A066314 <a href="/index/Br#bracelets">Index entries for sequences related to bracelets</a> %F A066314 a(n)=A001037(n)-A066313(n). %K A066314 nonn %O A066314 1,5 %A A066314 _Christian G. Bower_, Dec 13 2001