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.

A278259 Least number with the prime signature of the n-th quarter-square, a(1) = 0.

Table of values

n a(n)
1 0
2 1
3 2
4 4
5 6
6 4
7 12
8 16
9 12
10 4
11 30
12 36
13 30
14 4
15 24
16 64
17 72
18 16
19 60
20 36
21 30
22 4
23 60
24 144
25 60
26 4
27 30
28 36
29 210
30 36
31 240
32 256
33 48
34 4
35 60
36 144
37 60
38 4
39 60
40 144
41 420
42 36
43 210
44 36
45 30
46 4
47 120
48 576
49 360
50 16
51 60
52 36
53 120
54 64
55 360
56 144
57 60
58 4
59 210
60 900
61 210
62 4
63 96
64 1024
65 480
66 36
67 210
68 36
69 210
70 36
71 1260
72 1296
73 180
74 4
75 30
76 36
77 210
78 36
79 840
80 576
81 120
82 4
83 210
84 900
85 210
86 4
87 60

List of values

[0, 1, 2, 4, 6, 4, 12, 16, 12, 4, 30, 36, 30, 4, 24, 64, 72, 16, 60, 36, 30, 4, 60, 144, 60, 4, 30, 36, 210, 36, 240, 256, 48, 4, 60, 144, 60, 4, 60, 144, 420, 36, 210, 36, 30, 4, 120, 576, 360, 16, 60, 36, 120, 64, 360, 144, 60, 4, 210, 900, 210, 4, 96, 1024, 480, 36, 210, 36, 210, 36, 1260, 1296, 180, 4, 30, 36, 210, 36, 840, 576, 120, 4, 210, 900, 210, 4, 60]