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.

A081325 a(n) = sigma(n^2) modulo 4.

Table of values

n a(n)
1 1
2 3
3 1
4 3
5 3
6 3
7 1
8 3
9 1
10 1
11 1
12 3
13 3
14 3
15 3
16 3
17 3
18 3
19 1
20 1
21 1
22 3
23 1
24 3
25 1
26 1
27 1
28 3
29 3
30 1
31 1
32 3
33 1
34 1
35 3
36 3
37 3
38 3
39 3
40 1
41 3
42 3
43 1
44 3
45 3
46 3
47 1
48 3
49 1
50 3
51 3
52 1
53 3
54 3
55 3
56 3
57 1
58 1
59 1
60 1
61 3
62 3
63 1
64 3
65 1
66 3
67 1
68 1
69 1
70 1
71 1
72 3
73 3
74 1
75 1
76 3
77 1
78 1
79 1
80 1
81 1
82 1
83 1
84 3
85 1
86 3
87 3
88 3
89 3
90 1
91 3
92 3
93 1
94 3
95 3
96 3
97 3
98 3
99 1
100 3
101 3
102 1
103 1
104 1
105 3

List of values

[1, 3, 1, 3, 3, 3, 1, 3, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 3, 1, 3, 1, 1, 1, 3, 3, 1, 1, 3, 1, 1, 3, 3, 3, 3, 3, 1, 3, 3, 1, 3, 3, 3, 1, 3, 1, 3, 3, 1, 3, 3, 3, 3, 1, 1, 1, 1, 3, 3, 1, 3, 1, 3, 1, 1, 1, 1, 1, 3, 3, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 3, 3, 3, 1, 3, 3, 1, 3, 3, 3, 3, 3, 1, 3, 3, 1, 1, 1, 3]