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%I #6 Jul 09 2017 11:03:04
%S 1,1,1,3,13,40,130,427,1428,4860,16794
%N Related to number of mesh patterns of length 2 that avoid the pattern 321.
%H Murray Tannock, <a href="https://skemman.is/bitstream/1946/25589/1/msc-tannock-2016.pdf">Equivalence classes of mesh patterns with a dominating pattern</a>, MSc Thesis, Reykjavik Univ., May 2016. See Appendix B2.
%Y All of A000108, A001453, A246604, A273526, A120304, A289615, A289616, A289652, A289653, A289654 are very similar sequences.
%K nonn,more
%O 1,4
%A _N. J. A. Sloane_, Jul 09 2017
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