I'm trying to understand what is the meaning of this statement.

A088518 Symmetric secondary structures of RNA molecules with n nucleotides. 4


%S 1,1,1,2,2,4,5,9,12,21,29,50,71,121,175,296,434,730,1082,1812,2709,

%T 4521,6807,11328,17157,28485,43359,71844,109830,181674,278769,460443,

%U 708840,1169283,1805291,2974574,4604363,7578937,11758552,19337489,30064037

%N Symmetric secondary structures of RNA molecules with n nucleotides.

%C Diagonal sums of triangle in A088855. [From Philippe Deléham, Jan 04 2009]

%C Number of prime symmetric Dyck (n+2)-paths with no ascent of length 1. E.g. the a(3) = 2 5-paths are

UUUUUDDDDD and UUUDDUUDDD. - David Scambler, Aug 27 2012


closed as unclear what you're asking by AMR, March Ho, AliceD, MattDMo, The Last Word Jan 7 '16 at 5:20

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  • $\begingroup$ which language is that. I really can't understrand it. It certainly isn't python or c, so any guesses? $\endgroup$ – Tusky Jan 6 '16 at 14:25
  • $\begingroup$ Tusky, it's the pseudo code OEIS use. My question is about how I should understand the term symmetric in relation to the secondary structure of RNA molecules. The link was given for context. $\endgroup$ – user20986 Jan 6 '16 at 14:36

Each one of those lines has a reference to a paper which will help you to understand the calculation that was performed

Read this from your original post https://oeis.org/A088518

Overlapping sequences


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