cp's OEIS Frontend

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.

A053157 Number of 3-element intersecting families (with not necessarily distinct sets) whose union is an n-element set.

Table of values

n a(n)
1 1
2 5
3 32
4 235
5 1816
6 14055
7 107052
8 800315
9 5886416
10 42739855
11 307295572
12 2193374595
13 15571898616
14 110121224855
15 776543100092
16 5464689616075
17 38398915520416
18 269529406433055
19 1890416947176612
20 13251578251332755

List of values

[1, 5, 32, 235, 1816, 14055, 107052, 800315, 5886416, 42739855, 307295572, 2193374595, 15571898616, 110121224855, 776543100092, 5464689616075, 38398915520416, 269529406433055, 1890416947176612, 13251578251332755]

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

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