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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.

A078613 Same numbers of distinct prime factors of forms 4*k+1 and 4*k+3.

Table of values

n a(n)
1 1
2 2
3 4
4 8
5 15
6 16
7 30
8 32
9 35
10 39
11 45
12 51
13 55
14 60
15 64
16 70
17 75
18 78
19 87
20 90
21 91
22 95
23 102
24 110
25 111
26 115
27 117
28 119
29 120
30 123
31 128
32 135
33 140
34 143
35 150
36 153
37 155
38 156
39 159
40 174
41 175
42 180
43 182
44 183
45 187
46 190
47 203
48 204
49 215
50 219
51 220
52 222
53 225
54 230
55 234
56 235
57 238
58 240

List of values

[1, 2, 4, 8, 15, 16, 30, 32, 35, 39, 45, 51, 55, 60, 64, 70, 75, 78, 87, 90, 91, 95, 102, 110, 111, 115, 117, 119, 120, 123, 128, 135, 140, 143, 150, 153, 155, 156, 159, 174, 175, 180, 182, 183, 187, 190, 203, 204, 215, 219, 220, 222, 225, 230, 234, 235, 238, 240]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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