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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.

A237526 a(n) = number of unit squares in the first quadrant of a disk of radius sqrt(n) centered at the origin of a square lattice.

Table of values

n a(n)
0 0
1 0
2 1
3 1
4 1
5 3
6 3
7 3
8 4
9 4
10 6
11 6
12 6
13 8
14 8
15 8
16 8
17 10
18 11
19 11
20 13
21 13
22 13
23 13
24 13
25 15
26 17
27 17
28 17
29 19
30 19
31 19
32 20
33 20
34 22
35 22
36 22
37 24
38 24
39 24
40 26
41 28
42 28
43 28
44 28
45 30
46 30
47 30
48 30
49 30
50 33
51 33
52 35
53 37
54 37
55 37
56 37
57 37
58 39
59 39
60 39
61 41
62 41
63 41
64 41
65 45
66 45
67 45
68 47
69 47

List of values

[0, 0, 1, 1, 1, 3, 3, 3, 4, 4, 6, 6, 6, 8, 8, 8, 8, 10, 11, 11, 13, 13, 13, 13, 13, 15, 17, 17, 17, 19, 19, 19, 20, 20, 22, 22, 22, 24, 24, 24, 26, 28, 28, 28, 28, 30, 30, 30, 30, 30, 33, 33, 35, 37, 37, 37, 37, 37, 39, 39, 39, 41, 41, 41, 41, 45, 45, 45, 47, 47]

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

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