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Table 2
Values of the seven first Bell numbers.
| n | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
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| B n | 1 | 2 | 5 | 15 | 52 | 203 | 877 |
Notes. They provide the number of hypothesis to be formulated for a set of n = 2 to 7 distinct sources from different catalogues.
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