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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.

A317877 Number of free pure identity multifunctions with one atom and n positions.

Table of values

n a(n)
1 1
2 0
3 1
4 0
5 2
6 2
7 5
8 10
9 18
10 46
11 94
12 212
13 476
14 1058
15 2441
16 5564
17 12880
18 29920
19 69620
20 163220
21 383376
22 904114
23 2139592
24 5074784
25 12074152
26 28789112
27 68803148
28 164779064
29 395373108
30 950416330
31 2288438591
32 5518864858
33 13329183894
34 32237132814
35 78069124640

List of values

[1, 0, 1, 0, 2, 2, 5, 10, 18, 46, 94, 212, 476, 1058, 2441, 5564, 12880, 29920, 69620, 163220, 383376, 904114, 2139592, 5074784, 12074152, 28789112, 68803148, 164779064, 395373108, 950416330, 2288438591, 5518864858, 13329183894, 32237132814, 78069124640]

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

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