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%I #10 Oct 02 2019 17:45:38
%S 1,1,0,1,1,4,3,14,13,50,47,201,196,854,840,3839,3830,18001,17947,
%T 86471,86419,421989,421803,2079474,2079260,10306747,10305897,51263890,
%U 51263086,255514354,255510460,1275163904,1275160060,6368612099,6368594300,31821472593,31821454413
%N Number of primitive (aperiodic) palindromic structures using a maximum of five different symbols.
%C 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]
%H Andrew Howroyd, <a href="/A056479/b056479.txt">Table of n, a(n) for n = 0..500</a>
%F a(n) = Sum_{d|n} mu(d)*A056470(n/d) for n > 0.
%F a(n) = Sum_{k=1..5} A284826(n, k) for n > 0. - _Andrew Howroyd_, Oct 02 2019
%Y Cf. A056461, A056470, A284826.
%K nonn
%O 0,6
%A _Marks R. Nester_
%E a(0)=1 prepended and terms a(32) and beyond from _Andrew Howroyd_, Oct 02 2019
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