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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.

A299116 The number of sparse union-closed sets. That is, the number of union-closed sets on n elements containing the empty set and the universe, such that in average each set (not counting the empty set) has at most n/2 elements.

Table of values

n a(n)
1 0
2 0
3 0
4 2
5 27
6 3133
7 5777931

List of values

[0, 0, 0, 2, 27, 3133, 5777931]

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