cp's OEIS Frontend

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.

A379515 Numerators of the partial alternating sums of the reciprocals of the sum of unitary divisors function (A034448).

Table of values

n a(n)
1 1
2 2
3 11
4 43
5 53
6 4
7 37
8 293
9 329
10 103
11 113
12 107
13 809
14 129
15 809
16 12913
17 41119
18 39691
19 41833
20 8081
21 33395
22 32443
23 33871
24 10973
25 148361
26 48275
27 7149
28 34861
29 108119
30 319937
31 164941
32 1761311
33 112361
34 662011
35 5405483
36 26502319
37 516671461
38 508357441
39 3620857237
40 3556192637

List of values

[1, 2, 11, 43, 53, 4, 37, 293, 329, 103, 113, 107, 809, 129, 809, 12913, 41119, 39691, 41833, 8081, 33395, 32443, 33871, 10973, 148361, 48275, 7149, 34861, 108119, 319937, 164941, 1761311, 112361, 662011, 5405483, 26502319, 516671461, 508357441, 3620857237, 3556192637]

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

Content is available under The OEIS End-User License Agreement.