%I A056448
%S A056448 0,0,0,0,0,1,1,18,59,630,1681,28866,60083,757576,3514504,21423984,
%T A056448 64372109,1024999170,2026631203,26920954613,105501588414,742299897060,
%U A056448 1974251382095,31721456288956,74052852505684
%N A056448 Number of primitive (period n) step cyclic shifted sequence structures 
               using exactly six different symbols.
%C A056448 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 A056448 M. R. Nester (1999). Mathematical investigations of some plant interaction 
               designs. PhD Thesis. University of Queensland, Brisbane, Australia.
%F A056448 A056443(n)-A056442(n).
%Y A056448 Cf. A056428.
%Y A056448 Sequence in context: A155155 A048356 A027055 this_sequence A056438 A105521 
               A154563
%Y A056448 Adjacent sequences: A056445 A056446 A056447 this_sequence A056449 A056450 
               A056451
%K A056448 nonn
%O A056448 1,8
%A A056448 Marks R. Nester (nesterm(AT)dpi.qld.gov.au)