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Number of step shifted (decimated) sequence structures using exactly six different symbols.
1

%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_