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.

A358858 Least multiple m of n such that both m and m/n belong to A031443, or -1 if there is no such m.

Table of values

n a(n)
1 2
2 -1
3 147
4 -1
5 10
6 12
7 3745
8 -1
9 34587
10 8990
11 539
12 2364
13 156
14 728
15 135
16 -1
17 153
18 180
19 38
20 180
21 42
22 44
23 805
24 216
25 50
26 52
27 3969
28 56
29 62089
30 62850
31 1022721
32 -1
33 8515815
34 2158830
35 134715
36 553212
37 35557
38 34428
39 8814
40 144120
41 2296
42 8442
43 2107
44 8668
45 2205
46 2254

List of values

[2, -1, 147, -1, 10, 12, 3745, -1, 34587, 8990, 539, 2364, 156, 728, 135, -1, 153, 180, 38, 180, 42, 44, 805, 216, 50, 52, 3969, 56, 62089, 62850, 1022721, -1, 8515815, 2158830, 134715, 553212, 35557, 34428, 8814, 144120, 2296, 8442, 2107, 8668, 2205, 2254]

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

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