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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.

A178173 Number of collections of nonempty subsets of an n-element set where each element appears in at most 4 subsets.

Table of values

n a(n)
0 1
1 2
2 8
3 128
4 11087
5 2232875
6 775098224
7 428188962261
8 355916994389700
9 425272149099677521
10 703909738878615927739
11 1565842283246869237505246
12 4565002967677134523844716754
13 17076464900445281560851997140670
14 80494979734877344662882495100752511

List of values

[1, 2, 8, 128, 11087, 2232875, 775098224, 428188962261, 355916994389700, 425272149099677521, 703909738878615927739, 1565842283246869237505246, 4565002967677134523844716754, 17076464900445281560851997140670, 80494979734877344662882495100752511]

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

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