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.

A275409 Number of ordered ways to write n as 2*w^2 + x^2 + y^2 + z^2 with w + x + 2*y + 4*z a square, where w,x,y,z are nonnegative integers.

Table of values

n a(n)
0 1
1 2
2 1
3 0
4 2
5 2
6 2
7 1
8 1
9 1
10 0
11 3
12 1
13 2
14 1
15 1
16 3
17 2
18 5
19 3
20 4
21 3
22 1
23 1
24 1
25 1
26 2
27 2
28 2
29 4
30 2
31 2
32 4
33 2
34 7
35 3
36 1
37 6
38 2
39 1
40 2
41 3
42 4
43 5
44 1
45 1
46 3
47 5
48 3
49 3
50 4
51 3
52 7
53 3
54 2
55 4
56 3
57 4
58 4
59 3
60 1
61 4
62 5
63 3
64 6
65 4
66 4
67 4
68 5
69 7
70 7
71 3
72 6
73 5
74 5
75 4
76 3
77 11
78 2
79 2
80 4

List of values

[1, 2, 1, 0, 2, 2, 2, 1, 1, 1, 0, 3, 1, 2, 1, 1, 3, 2, 5, 3, 4, 3, 1, 1, 1, 1, 2, 2, 2, 4, 2, 2, 4, 2, 7, 3, 1, 6, 2, 1, 2, 3, 4, 5, 1, 1, 3, 5, 3, 3, 4, 3, 7, 3, 2, 4, 3, 4, 4, 3, 1, 4, 5, 3, 6, 4, 4, 4, 5, 7, 7, 3, 6, 5, 5, 4, 3, 11, 2, 2, 4]