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.

A280991 Positive integers that can be expressed as the sum of four pairwise coprime squares.

Table of values

n a(n)
1 3
2 4
3 7
4 12
5 15
6 19
7 27
8 28
9 31
10 36
11 39
12 43
13 51
14 52
15 55
16 60
17 63
18 67
19 75
20 76
21 79
22 84
23 87
24 91
25 99
26 103
27 108
28 111
29 115
30 123
31 124
32 127
33 132
34 135
35 139
36 147
37 148
38 151
39 156
40 159
41 163
42 171
43 172
44 175
45 180
46 183
47 187
48 195
49 196
50 199
51 204
52 207
53 211
54 219
55 220
56 223
57 228
58 231
59 235
60 243
61 244
62 247

List of values

[3, 4, 7, 12, 15, 19, 27, 28, 31, 36, 39, 43, 51, 52, 55, 60, 63, 67, 75, 76, 79, 84, 87, 91, 99, 103, 108, 111, 115, 123, 124, 127, 132, 135, 139, 147, 148, 151, 156, 159, 163, 171, 172, 175, 180, 183, 187, 195, 196, 199, 204, 207, 211, 219, 220, 223, 228, 231, 235, 243, 244, 247]

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

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