A091417 - cp's OEIS frontend

A091417 Integers n which are not the difference of 2 integers A and B where A is less than or equal to n such that AB+1 and AB-1 are both primes. In other words, the product A*B cannot be the middle integer of a twin prime pair.

n	a(n)
1	8
2	9
3	10
4	15
5	18
6	20
7	30
8	40
9	51
10	58
11	60
12	65
13	75
14	96
15	100
16	110
17	120
18	170
19	195
20	240
21	250
22	260
23	315
24	330
25	345
26	390
27	540
28	630
29	750
30	780
31	910
32	1020
33	1720
34	1890

[8, 9, 10, 15, 18, 20, 30, 40, 51, 58, 60, 65, 75, 96, 100, 110, 120, 170, 195, 240, 250, 260, 315, 330, 345, 390, 540, 630, 750, 780, 910, 1020, 1720, 1890]

cp's OEIS Frontend

A091417 Integers n which are not the difference of 2 integers A and B where A is less than or equal to n such that AB+1 and AB-1 are both primes. In other words, the product A*B cannot be the middle integer of a twin prime pair.

Table of values

List of values