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.

A371491 a(n) = Sum_{1 <= x_1, x_2, x_3, x_4, x_5 <= n} ( n/gcd(x_1, x_2, x_3, x_4, x_5, n) )^3.

Table of values

n a(n)
1 1
2 249
3 6535
4 63737
5 390501
6 1627215
7 5764459
8 16316665
9 42876109
10 97234749
11 214357551
12 416521295
13 815728525
14 1435350291
15 2551924035
16 4177066233
17 6975752529
18 10676151141
19 16983556183
20 24889362237
21 37670739565
22 53375030199
23 78310973115
24 106629405775

List of values

[1, 249, 6535, 63737, 390501, 1627215, 5764459, 16316665, 42876109, 97234749, 214357551, 416521295, 815728525, 1435350291, 2551924035, 4177066233, 6975752529, 10676151141, 16983556183, 24889362237, 37670739565, 53375030199, 78310973115, 106629405775]