A249132 - cp's OEIS frontend

A249132 Smallest noncomposite k such that prime(n) is the largest prime factor of k^2+1, or 0 if no such k exists.

n	a(n)
1	1
2	0
3	2
4	0
5	0
6	5
7	13
8	0
9	0
10	17
11	0
12	31
13	73
14	0
15	0
16	23
17	0
18	11
19	0
20	0
21	173
22	0
23	0
24	233
25	463
26	293
27	0
28	0
29	251
30	919
31	0
32	0
33	37
34	0
35	193
36	0
37	443
38	0
39	0
40	599
41	0
42	19
43	0
44	467
45	211
46	0
47	0
48	0
49	0
50	107
51	89
52	0
53	659
54	0
55	241
56	0
57	2503
58	0
59	337
60	53
61	0
62	3671
63	0
64	0

[1, 0, 2, 0, 0, 5, 13, 0, 0, 17, 0, 31, 73, 0, 0, 23, 0, 11, 0, 0, 173, 0, 0, 233, 463, 293, 0, 0, 251, 919, 0, 0, 37, 0, 193, 0, 443, 0, 0, 599, 0, 19, 0, 467, 211, 0, 0, 0, 0, 107, 89, 0, 659, 0, 241, 0, 2503, 0, 337, 53, 0, 3671, 0, 0]

cp's OEIS Frontend

A249132 Smallest noncomposite k such that prime(n) is the largest prime factor of k^2+1, or 0 if no such k exists.

Table of values

List of values