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.

A385352 Number of sums i^2 + j^2 that occur more than once for 1 <= i <= j <= n.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 1
8 2
9 3
10 3
11 5
12 6
13 8
14 11
15 12
16 14
17 18
18 19
19 24
20 25
21 29
22 33
23 40
24 44
25 47
26 51
27 57
28 63
29 68
30 71
31 80
32 85
33 91
34 101
35 106
36 111
37 118
38 127
39 136
40 140
41 151
42 159
43 168
44 181
45 187
46 199
47 208
48 217
49 229
50 238
51 249
52 260
53 276
54 290
55 300
56 311
57 324
58 334
59 347
60 354
61 368
62 386
63 402
64 420
65 429
66 445
67 462
68 481
69 497

List of values

[0, 0, 0, 0, 0, 0, 1, 2, 3, 3, 5, 6, 8, 11, 12, 14, 18, 19, 24, 25, 29, 33, 40, 44, 47, 51, 57, 63, 68, 71, 80, 85, 91, 101, 106, 111, 118, 127, 136, 140, 151, 159, 168, 181, 187, 199, 208, 217, 229, 238, 249, 260, 276, 290, 300, 311, 324, 334, 347, 354, 368, 386, 402, 420, 429, 445, 462, 481, 497]

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

Content is available under The OEIS End-User License Agreement.