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%I #13 Oct 01 2019 19:53:56
%S 0,0,0,0,0,0,0,0,0,1,1,13,21,154,266,1488,2646,12857,22827,101484,
%T 179487,752646,1323652,5325226,9321312,36387267,63436373,242085494,
%U 420693273,1577870839,2734926558,10120484024,17505749897,64096919293,110687251039,401885411487
%N Number of primitive (period n) periodic palindromic structures using exactly six different symbols.
%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="/A056523/b056523.txt">Table of n, a(n) for n = 1..200</a>
%F a(n) = A056517(n) - A056516(n).
%F Moebius transform of A056512. - _Andrew Howroyd_, Oct 01 2019
%e For example, aaabbb is not a (finite) palindrome but it is a periodic palindrome. Permuting the symbols will not change the structure. This should be different from A056512.
%Y Column 6 of A285037.
%Y Cf. A056485, A056512, A056516, A056517.
%K nonn
%O 1,12
%A _Marks R. Nester_
%E a(16)-a(26) from _Andrew Howroyd_, Apr 09 2017
%E Terms a(27) and beyond from _Andrew Howroyd_, Oct 01 2019
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