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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.

A259251 a(n) = 1 + sigma(n) + sigma(n)^2 + sigma(n)^3 + sigma(n)^4 + sigma(n)^5 + sigma(n)^6.

Table of values

n a(n)
1 7
2 1093
3 5461
4 137257
5 55987
6 3257437
7 299593
8 12204241
9 5229043
10 36012943
11 3257437
12 499738093
13 8108731
14 199411801
15 199411801
16 917087137
17 36012943
18 3611342281
19 67368421
20 5622910567
21 1108378657
22 2238976117
23 199411801
24 47446779661
25 917087137
26 5622910567

List of values

[7, 1093, 5461, 137257, 55987, 3257437, 299593, 12204241, 5229043, 36012943, 3257437, 499738093, 8108731, 199411801, 199411801, 917087137, 36012943, 3611342281, 67368421, 5622910567, 1108378657, 2238976117, 199411801, 47446779661, 917087137, 5622910567]

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

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