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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.

A051364 Number of 5-element families of an n-element set such that every 3 members of the family have a nonempty intersection.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 225
5 21571
6 1174122
7 51441824
8 2038356243
9 76714338477
10 2804947403364
11 100732231517698
12 3572491367063421
13 125474030774355263
14 4371052010746528926
15 151172238539268318372

List of values

[0, 0, 0, 0, 225, 21571, 1174122, 51441824, 2038356243, 76714338477, 2804947403364, 100732231517698, 3572491367063421, 125474030774355263, 4371052010746528926, 151172238539268318372]

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

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