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.

A194086 Second-smallest prime factor of the n-th Lucas number (beginning with 2), if composite, or 1 otherwise.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 1
5 1
6 3
7 1
8 1
9 19
10 41
11 1
12 7
13 1
14 281
15 11
16 1
17 1
18 3
19 1
20 2161
21 29
22 43
23 461
24 47
25 101
26 90481
27 19
28 14503
29 19489
30 3
31 1
32 4481
33 199
34 67
35 29
36 7
37 1
38 29134601
39 79
40 1601
41 1
42 3
43 144481
44 263
45 11
46 4969
47 1
48 769
49 599786069
50 41
51 919
52 103
53 1
54 3
55 199
56 10745088481
57 229

List of values

[1, 1, 1, 2, 1, 1, 3, 1, 1, 19, 41, 1, 7, 1, 281, 11, 1, 1, 3, 1, 2161, 29, 43, 461, 47, 101, 90481, 19, 14503, 19489, 3, 1, 4481, 199, 67, 29, 7, 1, 29134601, 79, 1601, 1, 3, 144481, 263, 11, 4969, 1, 769, 599786069, 41, 919, 103, 1, 3, 199, 10745088481, 229]