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 A056386 #6 Aug 22 2017 20:53:10 %S A056386 0,2,4,8,10,32,26,84,98,266,214,1200,702,2770,4328,8832,8230,44086, %T A056386 29202,135744,176720,419654,381490,2149068,1678244,5593294,7461064, %U A056386 22550600,19175158,134386396,71585134 %N A056386 Number of primitive (aperiodic) step shifted (decimated) sequences using exactly two different symbols. %C A056386 See A056371 for an explanation of step shifts. %D A056386 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 A056386 Sum mu(d)*A056376(n/d) where d divides n. %K A056386 nonn %O A056386 1,2 %A A056386 _Marks R. Nester_