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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.

A003466 Number of minimal covers of an n-set that have exactly one point which appears in more than one set in the cover.

Table of values

n a(n)
2 0
3 3
4 28
5 210
6 1506
7 10871
8 80592
9 618939
10 4942070
11 41076508
12 355372524
13 3198027157
14 29905143464
15 290243182755
16 2920041395248
17 30414515081650
18 327567816748638
19 3643600859114439
20 41809197852127240
21 494367554679088923
22 6017481714095327410

List of values

[0, 3, 28, 210, 1506, 10871, 80592, 618939, 4942070, 41076508, 355372524, 3198027157, 29905143464, 290243182755, 2920041395248, 30414515081650, 327567816748638, 3643600859114439, 41809197852127240, 494367554679088923, 6017481714095327410]

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

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