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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.

A181500 Triangle read by rows: number of solutions of n queens problem for given n and given number of queens engaged in conflicts.

Table of values

n a(n)
0 0
1 1
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
10 0
11 0
12 0
13 0
14 2
15 10
16 0
17 0
18 0
19 0
20 0
21 0
22 0
23 0
24 0
25 4
26 0
27 0
28 28
29 0
30 0
31 0
32 0
33 0
34 12
35 0
36 0
37 0
38 0
39 0
40 64
41 0
42 28
43 0
44 0
45 0
46 0
47 0
48 0
49 232
50 8
51 32
52 48
53 32

List of values

[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 28, 0, 0, 0, 0, 0, 12, 0, 0, 0, 0, 0, 64, 0, 28, 0, 0, 0, 0, 0, 0, 232, 8, 32, 48, 32]

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

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