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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.

A001181 Number of Baxter permutations of length n (also called Baxter numbers).

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 22
5 92
6 422
7 2074
8 10754
9 58202
10 326240
11 1882960
12 11140560
13 67329992
14 414499438
15 2593341586
16 16458756586
17 105791986682
18 687782586844
19 4517543071924
20 29949238543316
21 200234184620736
22 1349097425104912
23 9154276618636016
24 62522506583844272

List of values

[1, 1, 2, 6, 22, 92, 422, 2074, 10754, 58202, 326240, 1882960, 11140560, 67329992, 414499438, 2593341586, 16458756586, 105791986682, 687782586844, 4517543071924, 29949238543316, 200234184620736, 1349097425104912, 9154276618636016, 62522506583844272]

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

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