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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.

A225528 a(n) = sigma(n)*Lucas(n) where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.

Table of values

n a(n)
1 1
2 9
3 16
4 49
5 66
6 216
7 232
8 705
9 988
10 2214
11 2388
12 9016
13 7294
14 20232
15 32736
16 68417
17 64278
18 225342
19 186980
20 635334
21 783232
22 1425708
23 1537896
24 6220920
25 5200591
26 11400606
27 17568160
28 39796232
29 34495530
30 133955856
31 96331168
32 306863361
33 378297408
34 688610322
35 990395472
36 3038060662

List of values

[1, 9, 16, 49, 66, 216, 232, 705, 988, 2214, 2388, 9016, 7294, 20232, 32736, 68417, 64278, 225342, 186980, 635334, 783232, 1425708, 1537896, 6220920, 5200591, 11400606, 17568160, 39796232, 34495530, 133955856, 96331168, 306863361, 378297408, 688610322, 990395472, 3038060662]

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

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