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.

A278083 a(n) is 1/6 of the number of primitive integral quadruples with sum = 2*m and sum of squares = 2*m^2, where m = 2*n-1.

Table of values

n a(n)
1 1
2 4
3 4
4 8
5 12
6 12
7 12
8 16
9 16
10 20
11 32
12 24
13 20
14 36
15 28
16 32
17 48
18 32
19 36
20 48
21 40
22 44
23 48
24 48
25 56
26 64
27 52
28 48
29 80
30 60
31 60
32 96
33 48
34 68
35 96
36 72
37 72
38 80
39 96
40 80
41 108
42 84
43 64
44 112
45 88
46 96
47 128
48 80
49 96
50 144
51 100
52 104
53 128
54 108
55 108
56 144
57 112
58 96
59 144
60 128
61 132
62 160

List of values

[1, 4, 4, 8, 12, 12, 12, 16, 16, 20, 32, 24, 20, 36, 28, 32, 48, 32, 36, 48, 40, 44, 48, 48, 56, 64, 52, 48, 80, 60, 60, 96, 48, 68, 96, 72, 72, 80, 96, 80, 108, 84, 64, 112, 88, 96, 128, 80, 96, 144, 100, 104, 128, 108, 108, 144, 112, 96, 144, 128, 132, 160]