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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.

A190138 Final number of terms obtained with Euler's recurrence formula when computing the sum of divisors of n.

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 9
6 15
7 27
8 46
9 80
10 138
11 238
12 413
13 713
14 1235
15 2136
16 3695
17 6393
18 11057
19 19130
20 33091
21 57246
22 99032
23 171315
24 296365
25 512682
26 886902
27 1534266
28 2654154
29 4591475
30 7942870
31 13740526
32 23769981
33 41120131
34 71134474
35 123056829
36 212878289
37 368262059
38 637063333

List of values

[1, 2, 3, 5, 9, 15, 27, 46, 80, 138, 238, 413, 713, 1235, 2136, 3695, 6393, 11057, 19130, 33091, 57246, 99032, 171315, 296365, 512682, 886902, 1534266, 2654154, 4591475, 7942870, 13740526, 23769981, 41120131, 71134474, 123056829, 212878289, 368262059, 637063333]

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

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