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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.

A326364 Number of intersecting set systems with empty intersection (meaning there is no vertex in common to all the edges) covering n vertices.

Table of values

n a(n)
0 1
1 0
2 0
3 2
4 426
5 987404
6 887044205940
7 291072121051815578010398
8 14704019422368226413234332571239460300433492086
9 12553242487939461785560846872353486129110194397301168776798213375239447299205732561174066488

List of values

[1, 0, 0, 2, 426, 987404, 887044205940, 291072121051815578010398, 14704019422368226413234332571239460300433492086, 12553242487939461785560846872353486129110194397301168776798213375239447299205732561174066488]

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

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