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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.

A211508 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2=n-x*y.

Table of values

n a(n)
0 0
1 0
2 1
3 2
4 2
5 4
6 4
7 6
8 5
9 6
10 8
11 8
12 8
13 12
14 8
15 10
16 12
17 12
18 11
19 16
20 12
21 16
22 16
23 12
24 16
25 20
26 14
27 16
28 22
29 20
30 16
31 24
32 17
33 22
34 24
35 16
36 22
37 30
38 16
39 24
40 30
41 26
42 20
43 28
44 26
45 28
46 32
47 18
48 26
49 38
50 21
51 30
52 36
53 28
54 28
55 34
56 30
57 36
58 34
59 26
60 34
61 46
62 20
63 28
64 46
65 36
66 32
67 40
68 30
69 42
70 40

List of values

[0, 0, 1, 2, 2, 4, 4, 6, 5, 6, 8, 8, 8, 12, 8, 10, 12, 12, 11, 16, 12, 16, 16, 12, 16, 20, 14, 16, 22, 20, 16, 24, 17, 22, 24, 16, 22, 30, 16, 24, 30, 26, 20, 28, 26, 28, 32, 18, 26, 38, 21, 30, 36, 28, 28, 34, 30, 36, 34, 26, 34, 46, 20, 28, 46, 36, 32, 40, 30, 42, 40]

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

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