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.

A226998 The number of descents over all functions f:{1,2,...,n}->{1,2,...,n}.

Table of values

n a(n)
1 0
2 1
3 18
4 288
5 5000
6 97200
7 2117682
8 51380224
9 1377495072
10 40500000000
11 1296871230050
12 44952006426624
13 1677462128818632
14 67068898339975168
15 2860906750488281250
16 129703669268270284800
17 6228632560085359165568
18 315864220382241648869376
19 16868630748261621128320242

List of values

[0, 1, 18, 288, 5000, 97200, 2117682, 51380224, 1377495072, 40500000000, 1296871230050, 44952006426624, 1677462128818632, 67068898339975168, 2860906750488281250, 129703669268270284800, 6228632560085359165568, 315864220382241648869376, 16868630748261621128320242]

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

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