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%I M2935 #16 Nov 07 2017 18:18:17
%S 1,3,12,65,480,4851,67256,1281258,33576120,1211321683,60197760876,
%T 4122762095127,389255776509600,50680509287223315,9101288287232978112,
%U 2254758094831392182844
%N Number of motifs in triangular window of side n.
%C Also, half the number of (n+1) X (n+1) X (n+1) triangular binary arrays with no upright or inverted 2 X 2 X 2 subtriangle that is all 0's or all 1's. - _R. H. Hardin_, Oct 22 2010
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%D L. Vuillon (vuillon(AT)lmd.univ-mrs.fr), "Contribution a l'etude des pavages et des surfaces dicretisees", Dissertation, Universite de la mediterranee, Marseille, France 1996.
%H R. H. Hardin, <a href="/A007017/b007017.txt">Table of n, a(n) for n = 0..19</a>
%H G. Rauzy, <a href="/A007017/a007017.pdf">Notes/Letter to N. J. A. Sloane, n.d.</a>
%K nonn
%O 0,2
%A G. Rauzy
%E More terms from I. Gambini and L. Vuillon (vuillon(AT)lmd.univ-mrs.fr)
%E Offset set to 0 to match comment and b-file - _R. J. Mathar_, Oct 22 2010
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