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.

A303022 Number of free pure symmetric multifunctions (with empty expressions allowed) with one atom, n positions, and no unitary parts (subexpressions of the form x[y]).

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 5
6 12
7 27
8 63
9 152
10 376
11 939
12 2371
13 6047
14 15577
15 40429
16 105637
17 277625
18 733518
19 1947126
20 5190503
21 13888811
22 37291968
23 100444019
24 271316998
25 734802247
26 1994873116
27 5427893149
28 14799525982
29 40429761365
30 110645688034
31 303316712450
32 832799212777

List of values

[1, 1, 1, 2, 5, 12, 27, 63, 152, 376, 939, 2371, 6047, 15577, 40429, 105637, 277625, 733518, 1947126, 5190503, 13888811, 37291968, 100444019, 271316998, 734802247, 1994873116, 5427893149, 14799525982, 40429761365, 110645688034, 303316712450, 832799212777]

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

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