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%I #8 Jun 05 2016 23:53:18
%S 1,1,2,3,1,1,3,5,2,1,1,2,1,1,1,1,1,2,3,1,1,3,5,2,1,1,2,1,1,1,1,1,2,3,
%T 1,1,3,5,2,1,1,2,1,1,1,1,1,2,3,1,1,3,5,2,1,1,2,1,1,1,1,1,2,3,1,1,3,5,
%U 2,1,1,2,1,1,1,1,1,2,3,1,1,3,5,2,1,1,2,1,1,1,1,1,2,3,1,1,3,5,2
%N Frieze pattern with 5 rows, read by diagonals.
%C Period 15: repeat [1, 1, 2, 3, 1, 1, 3, 5, 2, 1, 1, 2, 1, 1, 1]. - _Wesley Ivan Hurt_, Jun 05 2016
%H James Propp, <a href="http://arxiv.org/abs/math/0511633">The combinatorics of frieze patterns and Markoff numbers</a>, arXiv:math/0511633v4.
%F Four adjacent entries
%F ...A...
%F .B...C.
%F ...D...
%F satisfy D = (BC-1)/A.
%e The frieze pattern is
%e ... 1 1 1 1 1 1 1 ...
%e .....1 3 2 1 3 2 ...
%e ....1 2 5 1 2 5 1 ...
%e .....1 3 2 1 3 2 ...
%e ... 1 1 1 1 1 1 1 ...
%Y Cf. A139434, A139458.
%K nonn,tabf
%O 0,3
%A _N. J. A. Sloane_, Jun 09 2008
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