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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.

A326373 Number of intersecting set systems with empty intersection (meaning there is no vertex in common to all the edges) on n vertices.

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 435
5 989555
6 887050136795
7 291072121058024908202443
8 14704019422368226413236661148207899662350666147
9 12553242487939461785560846872353486129110194529637343578112251094358919036718815137721635299

List of values

[1, 1, 1, 3, 435, 989555, 887050136795, 291072121058024908202443, 14704019422368226413236661148207899662350666147, 12553242487939461785560846872353486129110194529637343578112251094358919036718815137721635299]

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

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