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.

A180852 Numbers n such that the sum_i (d_i^i) of the i-th powers of their sorted divisors d_1< d_2<...< n is prime.

Table of values

n a(n)
1 2
2 9
3 18
4 5618
5 7744
6 10000
7 28561
8 30258
9 34322
10 40000
11 46225
12 165649
13 200978
14 249218
15 258064
16 310472
17 370881
18 393129
19 425042
20 438244
21 542882
22 595984
23 865928
24 916658
25 971618
26 1932578
27 2477476
28 2558322
29 3367225
30 3737378
31 3770258
32 3964081

List of values

[2, 9, 18, 5618, 7744, 10000, 28561, 30258, 34322, 40000, 46225, 165649, 200978, 249218, 258064, 310472, 370881, 393129, 425042, 438244, 542882, 595984, 865928, 916658, 971618, 1932578, 2477476, 2558322, 3367225, 3737378, 3770258, 3964081]

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

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