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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.

A057966 Triangle T(n,k) of number of minimal 5-covers of a labeled n-set that cover k points of that set uniquely (k=5,..,n).

Table of values

n a(n)
5 1
6 156
7 15
8 14196
9 2730
10 140
11 984256
12 283920
13 29120
14 1050
15 57578976
16 22145760
17 3407040
18 245700
19 6951
20 2994106752
21 1439474400
22 295276800
23 31941000
24 1807260
25 42525
26 142719088512
27 82337935680
28 21112291200
29 3045042000
30 258438180

List of values

[1, 156, 15, 14196, 2730, 140, 984256, 283920, 29120, 1050, 57578976, 22145760, 3407040, 245700, 6951, 2994106752, 1439474400, 295276800, 31941000, 1807260, 42525, 142719088512, 82337935680, 21112291200, 3045042000, 258438180]

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

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