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 A056334 #6 Aug 22 2017 20:53:09 %S A056334 1,1,3,9,31,111,454,1982,9130,43547,211658,1041316,5156641,25640000, %T A056334 127773440,637622320,3184387573,15910938734,79521737938,397510683092, %U A056334 1987259549544,9935420434636,49674470817194 %N A056334 Number of primitive (aperiodic) reversible string structures with n beads using a maximum of five different colors. %C A056334 A string and its reverse are considered to be equivalent. Permuting the colors will not change the structure. %D A056334 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 A056334 Sum mu(d)*A056324(n/d) where d|n. %Y A056334 Cf. A056316. %K A056334 nonn %O A056334 1,3 %A A056334 _Marks R. Nester_