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.

A284900 a(n) = Sum_{d|n} (-1)^(n/d+1)*d^4.

Table of values

n a(n)
1 1
2 15
3 82
4 239
5 626
6 1230
7 2402
8 3823
9 6643
10 9390
11 14642
12 19598
13 28562
14 36030
15 51332
16 61167
17 83522
18 99645
19 130322
20 149614
21 196964
22 219630
23 279842
24 313486
25 391251
26 428430
27 538084
28 574078
29 707282
30 769980
31 923522
32 978671
33 1200644
34 1252830
35 1503652
36 1587677

List of values

[1, 15, 82, 239, 626, 1230, 2402, 3823, 6643, 9390, 14642, 19598, 28562, 36030, 51332, 61167, 83522, 99645, 130322, 149614, 196964, 219630, 279842, 313486, 391251, 428430, 538084, 574078, 707282, 769980, 923522, 978671, 1200644, 1252830, 1503652, 1587677]