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.

A289738 Numbers k whose sum of divisors equals the sum of divisors of 2*k-1.

Table of values

n a(n)
1 1
2 6
3 348
4 496
5 1420
6 1854
7 4674
8 5352
9 6424
10 13545
11 21126
12 28210
13 37336
14 57645
15 84370
16 95526
17 109648
18 116865
19 140056
20 150366
21 163450
22 176826
23 215430
24 305900
25 321496
26 330858
27 517914
28 558304
29 590790
30 617260
31 682746
32 742518
33 888550
34 927336
35 952938
36 1058344
37 1096758

List of values

[1, 6, 348, 496, 1420, 1854, 4674, 5352, 6424, 13545, 21126, 28210, 37336, 57645, 84370, 95526, 109648, 116865, 140056, 150366, 163450, 176826, 215430, 305900, 321496, 330858, 517914, 558304, 590790, 617260, 682746, 742518, 888550, 927336, 952938, 1058344, 1096758]

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

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