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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.

A050454 a(n) = Sum_{d|n, d=3 mod 4} d^3.

Table of values

n a(n)
1 0
2 0
3 27
4 0
5 0
6 27
7 343
8 0
9 27
10 0
11 1331
12 27
13 0
14 343
15 3402
16 0
17 0
18 27
19 6859
20 0
21 370
22 1331
23 12167
24 27
25 0
26 0
27 19710
28 343
29 0
30 3402
31 29791
32 0
33 1358
34 0
35 43218
36 27
37 0
38 6859
39 59346
40 0
41 0
42 370
43 79507
44 1331
45 3402
46 12167
47 103823
48 27
49 343
50 0
51 132678
52 0
53 0

List of values

[0, 0, 27, 0, 0, 27, 343, 0, 27, 0, 1331, 27, 0, 343, 3402, 0, 0, 27, 6859, 0, 370, 1331, 12167, 27, 0, 0, 19710, 343, 0, 3402, 29791, 0, 1358, 0, 43218, 27, 0, 6859, 59346, 0, 0, 370, 79507, 1331, 3402, 12167, 103823, 27, 343, 0, 132678, 0, 0]

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

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