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.

A176006 The number of branching configurations of RNA (see Sankoff, 1985) with n or fewer hairpins.

Table of values

n a(n)
0 1
1 2
2 4
3 10
4 32
5 122
6 516
7 2322
8 10880
9 52466
10 258564
11 1296282
12 6589728
13 33887466
14 175966212
15 921353250
16 4858956288
17 25786112994
18 137604139012
19 737922992938
20 3974647310112
21 21493266631002
22 116642921832964
23 635074797251890

List of values

[1, 2, 4, 10, 32, 122, 516, 2322, 10880, 52466, 258564, 1296282, 6589728, 33887466, 175966212, 921353250, 4858956288, 25786112994, 137604139012, 737922992938, 3974647310112, 21493266631002, 116642921832964, 635074797251890]

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

Content is available under The OEIS End-User License Agreement.