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%I #6 May 29 2019 07:44:38
%S 1,2,6,6,6,6,27,486,486,486,486,6561,531441,531441,531441,531441,
%T 43046721,10460353203,10460353203,10460353203,10460353203,
%U 7625597484987,5559060566555523,5559060566555523,5559060566555523
%N Number of tilings of a special lattice of order n.
%H M. Ciucu, <a href="https://arxiv.org/abs/math/0501521">Perfect matchings and perfect powers</a>, arXiv:math/0501521 [math.CO], 2005.
%F Recurrence: a(n+30) = 3^(4f(n))*a(n), with f a 5-periodic function.
%K nonn
%O 0,2
%A _Ralf Stephan_, Feb 19 2005
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