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 A056384 #6 Aug 22 2017 20:53:10 %S A056384 5,20,70,350,820,8030,13170,102750,327050,2444780,4884430,61632150, %T A056384 101732420,1017309930,3816214730,19104506250,47683838320,635787430450, %U A056384 1059638680670,11924777944650,39736963208630 %N A056384 Number of primitive (aperiodic) step shifted (decimated) sequences using a maximum of five different symbols. %C A056384 See A056371 for an explanation of step shifts. %D A056384 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 A056384 Sum mu(d)*A056374(n/d) where d|n. %K A056384 nonn %O A056384 1,1 %A A056384 _Marks R. Nester_