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 A056366 #9 Aug 22 2017 20:53:09 %S A056366 0,1,1,2,3,5,8,14,21,39,62,112,189,352,607,1144,2055,3885,7154,13602, %T A056366 25472,48670,92204,176770,337590,649341,1246840,2404872,4636389, %U A056366 8964143,17334800 %N A056366 Number of primitive (period n) bracelet structures using exactly two different colored beads. %C A056366 Turning over will not create a new bracelet. Permuting the colors of the beads will not change the structure. Identical to A000046 for n>1. %D A056366 M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2] %F A056366 A000046(n)-A000007(n-1). %Y A056366 Column 2 of A276543. %Y A056366 Cf. A056303. %K A056366 nonn %O A056366 1,4 %A A056366 _Marks R. Nester_