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.

A008217 a(n) = floor(n/4)*floor((n+1)/4).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 1
5 1
6 1
7 2
8 4
9 4
10 4
11 6
12 9
13 9
14 9
15 12
16 16
17 16
18 16
19 20
20 25
21 25
22 25
23 30
24 36
25 36
26 36
27 42
28 49
29 49
30 49
31 56
32 64
33 64
34 64
35 72
36 81
37 81
38 81
39 90
40 100
41 100
42 100
43 110
44 121
45 121
46 121
47 132
48 144
49 144
50 144
51 156
52 169
53 169
54 169
55 182
56 196
57 196
58 196
59 210
60 225
61 225
62 225
63 240
64 256
65 256
66 256
67 272
68 289
69 289
70 289
71 306

List of values

[0, 0, 0, 0, 1, 1, 1, 2, 4, 4, 4, 6, 9, 9, 9, 12, 16, 16, 16, 20, 25, 25, 25, 30, 36, 36, 36, 42, 49, 49, 49, 56, 64, 64, 64, 72, 81, 81, 81, 90, 100, 100, 100, 110, 121, 121, 121, 132, 144, 144, 144, 156, 169, 169, 169, 182, 196, 196, 196, 210, 225, 225, 225, 240, 256, 256, 256, 272, 289, 289, 289, 306]

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

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