cp's OEIS Frontend

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.

A289031 Number of perfect matchings on n+3 edges which represent RNA secondary folding structures characterized by the Reeder and Giegerich and the Lyngso and Pedersen families, but not the family characterized by Cao and Chen.

Table of values

n a(n)
1 1
2 8
3 42
4 186
5 759
6 2970
7 11369
8 43024
9 161889
10 607630
11 2279156
12 8552292
13 32124073
14 120828404
15 455175495
16 1717506346
17 6491412107
18 24575174688
19 93187097419
20 353912403794
21 1346146363275
22 5127660231072
23 19559151930621
24 74706450932970

List of values

[1, 8, 42, 186, 759, 2970, 11369, 43024, 161889, 607630, 2279156, 8552292, 32124073, 120828404, 455175495, 1717506346, 6491412107, 24575174688, 93187097419, 353912403794, 1346146363275, 5127660231072, 19559151930621, 74706450932970]

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

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