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.

A003648 Class number of quadratic forms with discriminant 4n, n == 2,3^( mod 4).

Table of values

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

List of values

[1, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 4, 2, 4, 4, 2, 4, 4, 2, 2, 2, 4, 4, 2, 2, 2, 4, 2, 4, 2, 2, 4, 6, 4, 2, 2, 4, 4, 2, 4, 4, 2, 2, 2, 4, 4, 4, 4, 2, 4, 2, 4, 2, 4, 2, 2, 4, 2, 6, 4, 4, 2, 4, 4, 2, 4, 2, 2, 2, 4, 4, 4, 2, 4, 4, 4, 4, 4, 2, 4, 8, 2, 2, 4, 2, 8, 2, 2, 4, 2, 8, 4, 6, 8, 2, 4, 8, 12, 4, 2, 4, 4, 2]