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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.

A076872 a(n) = number of numbers <= n that are the sum of two squarefull numbers.

Table of values

n a(n)
1 0
2 1
3 1
4 1
5 2
6 2
7 2
8 3
9 4
10 5
11 5
12 6
13 7
14 7
15 7
16 8
17 9
18 10
19 10
20 11
21 11
22 11
23 11
24 12
25 13
26 14
27 14
28 15
29 16
30 16
31 17
32 18
33 19
34 20
35 21
36 22
37 23
38 23
39 23
40 24
41 25
42 25
43 26
44 27
45 28
46 28
47 28
48 29
49 29
50 30
51 30
52 31
53 32
54 33
55 33
56 33
57 34
58 35
59 36
60 36
61 37
62 37
63 38
64 39
65 40
66 40
67 40
68 41
69 41
70 41
71 41
72 42
73 43
74 44
75 44

List of values

[0, 1, 1, 1, 2, 2, 2, 3, 4, 5, 5, 6, 7, 7, 7, 8, 9, 10, 10, 11, 11, 11, 11, 12, 13, 14, 14, 15, 16, 16, 17, 18, 19, 20, 21, 22, 23, 23, 23, 24, 25, 25, 26, 27, 28, 28, 28, 29, 29, 30, 30, 31, 32, 33, 33, 33, 34, 35, 36, 36, 37, 37, 38, 39, 40, 40, 40, 41, 41, 41, 41, 42, 43, 44, 44]

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

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