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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.

A308698 Square array A(n,k), n >= 1, k >= 0, read by antidiagonals, where A(n,k) is Sum_{d|n} d^(k*d).

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 5
6 2
7 1
8 17
9 28
10 3
11 1
12 65
13 730
14 261
15 2
16 1
17 257
18 19684
19 65553
20 3126
21 4
22 1
23 1025
24 531442
25 16777281
26 9765626
27 46688
28 2
29 1
30 4097
31 14348908
32 4294967553
33 30517578126
34 2176783082
35 823544
36 4
37 1
38 16385
39 387420490
40 1099511628801
41 95367431640626
42 101559956688164
43 678223072850
44 16777477
45 3

List of values

[1, 1, 2, 1, 5, 2, 1, 17, 28, 3, 1, 65, 730, 261, 2, 1, 257, 19684, 65553, 3126, 4, 1, 1025, 531442, 16777281, 9765626, 46688, 2, 1, 4097, 14348908, 4294967553, 30517578126, 2176783082, 823544, 4, 1, 16385, 387420490, 1099511628801, 95367431640626, 101559956688164, 678223072850, 16777477, 3]