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%I #6 Aug 22 2017 20:53:11
%S 0,0,0,0,1,9,26,299,1183,10700,24736,349232,626053,6680953,26364609,
%T 137246955,353304459,4826416835,8199440662,93679518802,315943737305,
%U 1913783049725,4382586624256,60629067426943
%N Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly five 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 A056404(n)-A056403(n).
%Y Cf. A056389.
%K nonn
%O 1,6
%A _Marks R. Nester_
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