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.

A289834 Number of perfect matchings on n edges which represent RNA secondary folding structures characterized by the Lyngso and Pedersen (L&P) family and the Cao and Chen (C&C) family.

Table of values

n a(n)
0 1
1 1
2 3
3 11
4 39
5 134
6 456
7 1557
8 5364
9 18674
10 65680
11 233182
12 834796
13 3010712
14 10929245
15 39904623
16 146451871
17 539972534
18 1999185777
19 7429623640
20 27705320423
21 103636336176
22 388775988319
23 1462261313876
24 5513152229901
25 20832701135628
26 78884459229627

List of values

[1, 1, 3, 11, 39, 134, 456, 1557, 5364, 18674, 65680, 233182, 834796, 3010712, 10929245, 39904623, 146451871, 539972534, 1999185777, 7429623640, 27705320423, 103636336176, 388775988319, 1462261313876, 5513152229901, 20832701135628, 78884459229627]

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

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