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 A056367 #9 Aug 22 2017 20:53:09 %S A056367 0,0,1,2,5,13,31,80,201,533,1401,3822,10395,28859,80201,225286,634265, %T A056367 1796433,5100325,14534758,41513402,118879249,341094843,980661980, %U A056367 2824223490,8146897815,23535345170 %N A056367 Number of primitive (period n) bracelet structures using exactly three different colored beads. %C A056367 Turning over will not create a new bracelet. Permuting the colors of the beads will not change the structure. %D A056367 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 A056367 A056362(n)-A000046(n). %Y A056367 Column 3 of A276543. %Y A056367 Cf. A056304. %K A056367 nonn %O A056367 1,4 %A A056367 _Marks R. Nester_