A103643 - OEIS

%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