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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.

A089004 Number of partitions of an n-element set that have at least one odd block.

Table of values

n a(n)
1 1
2 1
3 5
4 11
5 52
6 172
7 877
8 3761
9 21147
10 109419
11 678570
12 4063248
13 27644437
14 186525861
15 1382958545
16 10323844183
17 82864869804
18 675378319788
19 5832742205057
20 51386368744773
21 474869816156751
22 4486977535640087

List of values

[1, 1, 5, 11, 52, 172, 877, 3761, 21147, 109419, 678570, 4063248, 27644437, 186525861, 1382958545, 10323844183, 82864869804, 675378319788, 5832742205057, 51386368744773, 474869816156751, 4486977535640087]

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

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