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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.

A379482 a(n) = sigma(A003961(n^2)), where A003961 is fully multiplicative with a(prime(i)) = prime(i+1), and sigma is the sum of divisors function.

Table of values

n a(n)
1 1
2 13
3 31
4 121
5 57
6 403
7 133
8 1093
9 781
10 741
11 183
12 3751
13 307
14 1729
15 1767
16 9841
17 381
18 10153
19 553
20 6897
21 4123
22 2379
23 871
24 33883
25 2801
26 3991
27 19531
28 16093
29 993
30 22971
31 1407
32 88573
33 5673
34 4953
35 7581
36 94501
37 1723
38 7189
39 9517
40 62301
41 1893
42 53599
43 2257
44 22143
45 44517
46 11323
47 2863
48 305071
49 16105
50 36413
51 11811
52 37147
53 3541

List of values

[1, 13, 31, 121, 57, 403, 133, 1093, 781, 741, 183, 3751, 307, 1729, 1767, 9841, 381, 10153, 553, 6897, 4123, 2379, 871, 33883, 2801, 3991, 19531, 16093, 993, 22971, 1407, 88573, 5673, 4953, 7581, 94501, 1723, 7189, 9517, 62301, 1893, 53599, 2257, 22143, 44517, 11323, 2863, 305071, 16105, 36413, 11811, 37147, 3541]

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

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