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%I #9 Mar 06 2020 04:03:50
%S 1,1,2,6,20,66,221,757,2647,9402,33813,122876,450543,1664835,6193553,
%T 23178525,87199503,329592705,1251029482,4766563155,18223733493,
%U 69892469057,268824143700,1036690445777,4007586822784
%N Number of extended RNA secondary structures of size n according to the zu Siederdissen et al. (2011) model.
%C It appears that "pseudoknot-free RNA secondary structures with base triples are a new combinatorial object and ... not bijective to any other combinatorial objects studied before". [Müller and Nebel]
%H Christian Höner zu Siederdissen, Stephan H. Bernhart, Peter F. Stadler, Ivo L. Hofacker, <a href="https://doi.org/10.1093/bioinformatics/btr220">A folding algorithm for extended RNA secondary structures</a>, Bioinformatics, 27(13):129-136 (2011).
%H R. Müller and M. E. Nebel, <a href="http://wwwagak.cs.uni-kl.de/downloads/papers/Combinatorics_of_RNA_secondary_structures_with_base_triples.pdf">Combinatorics of RNA secondary structures with base triples</a>, preprint of Journal of Computational Biology, Jul 2015.619-648, 2013.
%K nonn
%O 1,3
%A _N. J. A. Sloane_, Jun 11 2013