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 A056432 #6 Aug 22 2017 20:53:11 %S A056432 1,2,3,7,8,36,35,201,393,2370,3971,46094,66675,613439,2139350, %T A056432 10016839,23424253,294723254,465082931,4972761822,15773188813, %U A056432 90323063945,196342666487,2587522663248,4967200045397,39800811900389 %N A056432 Step cyclic shifted sequence structures using a maximum of five different symbols. %C A056432 See A056371 for an explanation of step shifts. Under step cyclic shifts, abcde, bdace, bcdea, cdeab and daceb etc. are equivalent. Permuting the symbols will not change the structure. %D A056432 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 A056432 Use de Bruijn's generalization of Polya's enumeration theorem as discussed in reference. %Y A056432 Cf. A056413. %K A056432 nonn %O A056432 1,2 %A A056432 _Marks R. Nester_