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.

A386425 Odd composites k such that sigma(k) has the same powerful part as k, where sigma is the sum of divisors function.

Table of values

n a(n)
1 153
2 801
3 1773
4 3725
5 4689
6 4753
7 5013
8 6957
9 8577
10 8725
11 9549
12 9873
13 11493
14 13437
15 14409
16 15381
17 18621
18 19269
19 21213
20 21537
21 23481
22 25101
23 26073
24 26225
25 28989
26 29161
27 29313
28 29961
29 32229
30 33849
31 34173
32 36117
33 38061
34 39033
35 40653
36 42597
37 43893
38 47457
39 47781
40 48725
41 48753
42 51669
43 52317
44 54261
45 56953
46 57177
47 57501

List of values

[153, 801, 1773, 3725, 4689, 4753, 5013, 6957, 8577, 8725, 9549, 9873, 11493, 13437, 14409, 15381, 18621, 19269, 21213, 21537, 23481, 25101, 26073, 26225, 28989, 29161, 29313, 29961, 32229, 33849, 34173, 36117, 38061, 39033, 40653, 42597, 43893, 47457, 47781, 48725, 48753, 51669, 52317, 54261, 56953, 57177, 57501]

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

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