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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.

A327510 Number of set partitions of [n] where each subset is again partitioned into nine nonempty subsets.

Table of values

n a(n)
0 1
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 1
10 45
11 1155
12 22275
13 359502
14 5135130
15 67128490
16 820784250
17 9528822303
18 106175420065
19 1144618783815
20 12011663703975
21 123297356170054
22 1243260840764910
23 12377559175117290
24 122870882863640450
25 1247553197735599755
26 13803307806688911225

List of values

[1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 45, 1155, 22275, 359502, 5135130, 67128490, 820784250, 9528822303, 106175420065, 1144618783815, 12011663703975, 123297356170054, 1243260840764910, 12377559175117290, 122870882863640450, 1247553197735599755, 13803307806688911225]

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

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