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.

A007746 Number of ways for n-3 nonintersecting loops to cross a line 2n times.

Table of values

n a(n)
4 42
5 640
6 5894
7 42840
8 271240
9 1569984
10 8536890
11 44346456
12 222516030
13 1086685600
14 5193298110
15 24384586200
16 112831907760
17 515709552000
18 2332549535400
19 10455495457248
20 46500885666900
21 205401168733824
22 901819865269180
23 3938266773556720
24 17116175702216624

List of values

[42, 640, 5894, 42840, 271240, 1569984, 8536890, 44346456, 222516030, 1086685600, 5193298110, 24384586200, 112831907760, 515709552000, 2332549535400, 10455495457248, 46500885666900, 205401168733824, 901819865269180, 3938266773556720, 17116175702216624]

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

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