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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.

A038759 a(n) = ceiling(sqrt(n))*floor(sqrt(n)).

Table of values

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

List of values

[0, 1, 2, 2, 4, 6, 6, 6, 6, 9, 12, 12, 12, 12, 12, 12, 16, 20, 20, 20, 20, 20, 20, 20, 20, 25, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 36, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 49, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 64, 72, 72, 72, 72, 72, 72, 72]

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

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