cp's OEIS Frontend

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.

A178171 Number of collections of nonempty subsets of an n-element set where each element appears in at most 3 subsets.

Table of values

n a(n)
0 1
1 2
2 8
3 109
4 3623
5 200522
6 16514461
7 1912959395
8 298569495981
9 60701549078701
10 15647889334180500
11 5003666238486522124
12 1948975409748003520112
13 910680909359710587298621
14 503845222094502583681150340
15 326363222435413478204610417626
16 245078255691857705139839897934085

List of values

[1, 2, 8, 109, 3623, 200522, 16514461, 1912959395, 298569495981, 60701549078701, 15647889334180500, 5003666238486522124, 1948975409748003520112, 910680909359710587298621, 503845222094502583681150340, 326363222435413478204610417626, 245078255691857705139839897934085]

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

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