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%I #9 Aug 22 2017 20:53:09
%S 0,0,0,0,1,9,76,542,3523,21392,123680,690541,3756151,20042513,
%T 105394295,548123440,2826435403,14479201301,73794961960,374603863517,
%U 1895632969275,9568915248589,48208452866816
%N Number of primitive (aperiodic) reversible string structures with n beads using exactly five different colors.
%C A string and its reverse are considered to be equivalent. Permuting the colors 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 A056334(n)-A056333(n).
%Y Column 5 of A276544.
%Y Cf. A056321.
%K nonn
%O 1,6
%A _Marks R. Nester_
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