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%I #10 Aug 22 2017 20:53:10
%S 0,0,0,0,0,1,4,83,454,5761,17998,334797,777107,10574995,52611728,
%T 342199022,1094122103,18448004619,38504610244,538330833767,
%U 2215487105217,16330536710131,45407723468330
%N Number of step shifted (decimated) sequence structures using exactly six different symbols.
%C See A056371 for an explanation of step shifts. 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 A056395(n)-A056394(n).
%Y Column 6 of A288620.
%Y Cf. A056380.
%K nonn
%O 1,7
%A _Marks R. Nester_
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