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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.

A247660 Number of bi-indecomposable topologies on n labeled points.

Table of values

n a(n)
1 1
2 2
3 15
4 229
5 5298
6 177661
7 8605831
8 601894158
9 60571434501
10 8716575772821
11 1780241773757704
12 511992638746006383
13 205785031866223973343
14 114780183140747719353332
15 88271680420025831479693219
16 93054995762621287409298093049

List of values

[1, 2, 15, 229, 5298, 177661, 8605831, 601894158, 60571434501, 8716575772821, 1780241773757704, 511992638746006383, 205785031866223973343, 114780183140747719353332, 88271680420025831479693219, 93054995762621287409298093049]

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

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