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 A056302 #9 Aug 22 2017 20:53:08 %S A056302 1,1,2,5,11,39,125,532,2301,11010,54681,284023,1509851,8194902, %T A056302 45080652,250641356,1404374247,7917209005,44848645457,255055220735, %U A056302 1455247360000,8326191235902,47752990403133 %N A056302 Number of primitive (period n) n-bead necklace structures using a maximum of six different colored beads. %C A056302 Turning over the necklace is not allowed. Colors may be permuted without changing the necklace structure. %C A056302 a(n) = A107424(n, 1)+A107424(n, 2)+...+A107424(n, 6). - _David Wasserman_, May 31 2005 %D A056302 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 A056302 sum mu(d)*A056294(n/d) where d|n and n>0. %Y A056302 Cf. A032164. %K A056302 nonn %O A056302 1,3 %A A056302 _Marks R. Nester_