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%I #9 Aug 22 2017 20:53:11
%S 0,0,0,0,1,3,6,52,148,1140,2306,30121,48476,478957,1762917,8601630,
%T 20789656,268188642,431583572,4685759111,15045763312,86991023001,
%U 190548007556,2526401808203,4873374476388,39199367162137
%N Number of step cyclic shifted sequence structures using exactly five different symbols.
%C 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 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(n)-A056431(n).
%Y Column 5 of A288627.
%Y Cf. A056418.
%K nonn
%O 1,6
%A _Marks R. Nester_
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