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.

A115651 Powerful(1) numbers (A001694) which are the sum of distinct double factorials (A006882).

Table of values

n a(n)
1 1
2 4
3 8
4 9
5 16
6 25
7 27
8 49
9 64
10 72
11 108
12 121
13 125
14 128
15 169
16 392
17 400
18 432
19 441
20 500
21 512
22 961
23 968
24 972
25 1125
26 1331
27 1352
28 1444
29 3844
30 3888
31 3969
32 4225
33 4232
34 4356
35 4900
36 4913
37 5184
38 5292
39 5324
40 10404
41 10800
42 10952
43 11449
44 11881
45 14283
46 14400

List of values

[1, 4, 8, 9, 16, 25, 27, 49, 64, 72, 108, 121, 125, 128, 169, 392, 400, 432, 441, 500, 512, 961, 968, 972, 1125, 1331, 1352, 1444, 3844, 3888, 3969, 4225, 4232, 4356, 4900, 4913, 5184, 5292, 5324, 10404, 10800, 10952, 11449, 11881, 14283, 14400]