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.

A331079 a(n) = Sum_{i=1..n} u_2(i)*u_2(i+1), where u_2(n) = A038548(n).

Table of values

n a(n)
1 1
2 2
3 4
4 6
5 8
6 10
7 12
8 16
9 20
10 22
11 25
12 28
13 30
14 34
15 40
16 43
17 46
18 49
19 52
20 58
21 62
22 64
23 68
24 76
25 80
26 84
27 90
28 93
29 97
30 101
31 104
32 110
33 114
34 118
35 128
36 133
37 135
38 139
39 147
40 151
41 155
42 159
43 162
44 171
45 177
46 179
47 184
48 194
49 200
50 206
51 212
52 215
53 219
54 227
55 235
56 243
57 247
58 249
59 255
60 261

List of values

[1, 2, 4, 6, 8, 10, 12, 16, 20, 22, 25, 28, 30, 34, 40, 43, 46, 49, 52, 58, 62, 64, 68, 76, 80, 84, 90, 93, 97, 101, 104, 110, 114, 118, 128, 133, 135, 139, 147, 151, 155, 159, 162, 171, 177, 179, 184, 194, 200, 206, 212, 215, 219, 227, 235, 243, 247, 249, 255, 261]