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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.

A058793 Number of covers of an unlabeled n-set such that every point of the set is covered by exactly 6 subsets of the cover and that intersection of every 6 subsets of the cover contains at most one point.

Table of values

n a(n)
1 1
2 6
3 73
4 2957
5 431805
6 193413963
7 198914729182
8 389238347659505
9 1292594846197639190
10 6753309741099683530616

List of values

[1, 6, 73, 2957, 431805, 193413963, 198914729182, 389238347659505, 1292594846197639190, 6753309741099683530616]

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

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