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.

A212291 Number of permutations of n elements with at most one fixed point.

Table of values

n a(n)
0 1
1 1
2 1
3 5
4 17
5 89
6 529
7 3709
8 29665
9 266993
10 2669921
11 29369141
12 352429681
13 4581585865
14 64142202097
15 962133031469
16 15394128503489
17 261700184559329
18 4710603322067905
19 89501463119290213
20 1790029262385804241
21 37590614510101889081
22 826993519222241559761

List of values

[1, 1, 1, 5, 17, 89, 529, 3709, 29665, 266993, 2669921, 29369141, 352429681, 4581585865, 64142202097, 962133031469, 15394128503489, 261700184559329, 4710603322067905, 89501463119290213, 1790029262385804241, 37590614510101889081, 826993519222241559761]

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

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