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.

A322295 Number of permutations of [2n] with exactly n rising or falling successions.

Table of values

n a(n)
0 1
1 2
2 10
3 120
4 2198
5 54304
6 1674468
7 61736880
8 2644978110
9 129019925424
10 7056278570108
11 427516982398576
12 28417031969575260
13 2055803302988520320
14 160786792285272198088
15 13517797622576903566560
16 1215656330296317906395790
17 116440107306323155369822800

List of values

[1, 2, 10, 120, 2198, 54304, 1674468, 61736880, 2644978110, 129019925424, 7056278570108, 427516982398576, 28417031969575260, 2055803302988520320, 160786792285272198088, 13517797622576903566560, 1215656330296317906395790, 116440107306323155369822800]

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

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