A266239 - cp's OEIS frontend

A266239 a(n) is the smallest k such that the following are four primes: prime(n)k-1, prime(n)k+1, prime(n)k^2-1, prime(n)k^2+1. Or -1 if no such k exists.

n	a(n)
1	3
2	2
3	6
4	66
5	300
6	24
7	3744
8	27000
9	6
10	1080
11	960
12	90
13	30
14	366
15	9204
16	8154
17	1170
18	840
19	330
20	6090
21	84
22	27720
23	324
24	90
25	186
26	4740
27	2856
28	6
29	24270
30	936
31	5220
32	1560
33	6
34	1500
35	510
36	120
37	930
38	3270
39	30
40	8520
41	29700
42	1200
43	23310
44	1056
45	3540
46	90
47	3420
48	2370
49	9654
50	83040
51	2610
52	9270
53	2610

[3, 2, 6, 66, 300, 24, 3744, 27000, 6, 1080, 960, 90, 30, 366, 9204, 8154, 1170, 840, 330, 6090, 84, 27720, 324, 90, 186, 4740, 2856, 6, 24270, 936, 5220, 1560, 6, 1500, 510, 120, 930, 3270, 30, 8520, 29700, 1200, 23310, 1056, 3540, 90, 3420, 2370, 9654, 83040, 2610, 9270, 2610]

cp's OEIS Frontend

A266239 a(n) is the smallest k such that the following are four primes: prime(n)k-1, prime(n)k+1, prime(n)k^2-1, prime(n)k^2+1. Or -1 if no such k exists.

Table of values

List of values

cp's OEIS Frontend

A266239 a(n) is the smallest k such that the following are four primes: prime(n)*k-1, prime(n)*k+1, prime(n)*k^2-1, prime(n)*k^2+1. Or -1 if no such k exists.

Table of values

List of values

A266239 a(n) is the smallest k such that the following are four primes: prime(n)k-1, prime(n)k+1, prime(n)k^2-1, prime(n)k^2+1. Or -1 if no such k exists.