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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A110318 Number of arcs covered by other arcs in all RNA secondary structures of size n+5 (i.e., with n+5 nodes).

Table of values

n a(n)
0 1
1 5
2 17
3 53
4 157
5 448
6 1250
7 3434
8 9326
9 25114
10 67196
11 178895
12 474398
13 1254072
14 3306738
15 8701193
16 22857026
17 59958380
18 157098360
19 411214120
20 1075491286
21 2810892598
22 7342205478
23 19168694232
24 50023584613
25 130497101659
26 340325126923
27 887307420361

List of values

[1, 5, 17, 53, 157, 448, 1250, 3434, 9326, 25114, 67196, 178895, 474398, 1254072, 3306738, 8701193, 22857026, 59958380, 157098360, 411214120, 1075491286, 2810892598, 7342205478, 19168694232, 50023584613, 130497101659, 340325126923, 887307420361]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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