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%I #7 Aug 22 2017 20:53:10
%S 0,2,4,10,10,38,26,94,102,278,214,1246,702,2798,4342,8926,8230,44222,
%T 29202,136030,176750,419870,381490,2150398,1678254,5593998,7461166,
%U 22553406,19175158,134391038,71585134
%N Number of step shifted (decimated) sequences using exactly two different symbols.
%C See A056371 for an explanation of step shifts.
%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 A056371(n)-2.
%Y Cf. A056371.
%K nonn
%O 1,2
%A _Marks R. Nester_
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