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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.

A203838 a(n) = sigma_3(n)*Fibonacci(n), where sigma_3(n) = A001158(n), the sum of cubes of divisors of n.

Table of values

n a(n)
1 1
2 9
3 56
4 219
5 630
6 2016
7 4472
8 12285
9 25738
10 62370
11 118548
12 294336
13 512134
14 1167192
15 2152080
16 4620147
17 7847658
18 17604792
19 28681660
20 62224470
21 105431872
22 212319468
23 348698376
24 759507840
25 1181718775
26 2401396326
27 4014783920
28 7980869832
29 12542045310

List of values

[1, 9, 56, 219, 630, 2016, 4472, 12285, 25738, 62370, 118548, 294336, 512134, 1167192, 2152080, 4620147, 7847658, 17604792, 28681660, 62224470, 105431872, 212319468, 348698376, 759507840, 1181718775, 2401396326, 4014783920, 7980869832, 12542045310]

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

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