A090695 - cp's OEIS frontend

A090695 Integers which are not the sum of 2 integers A and B with AB+1 and AB-1 both primes. In other words, the product cannot be the middle integer of a Twin Prime pair.

n	a(n)
1	1
2	2
3	3
4	6
5	10
6	12
7	14
8	15
9	20
10	26
11	30
12	40
13	45
14	54
15	60
16	66
17	75
18	80
19	90
20	100
21	105
22	117
23	120
24	150
25	180
26	250
27	270
28	280
29	290
30	315
31	320
32	342
33	360
34	390
35	410
36	432
37	440
38	450
39	455
40	480
41	495
42	510
43	540
44	560
45	590
46	630
47	645
48	765
49	810
50	980
51	1080
52	1170
53	1220
54	1305
55	1430
56	1530
57	1860
58	2235
59	2310
60	2670
61	3120

[1, 2, 3, 6, 10, 12, 14, 15, 20, 26, 30, 40, 45, 54, 60, 66, 75, 80, 90, 100, 105, 117, 120, 150, 180, 250, 270, 280, 290, 315, 320, 342, 360, 390, 410, 432, 440, 450, 455, 480, 495, 510, 540, 560, 590, 630, 645, 765, 810, 980, 1080, 1170, 1220, 1305, 1430, 1530, 1860, 2235, 2310, 2670, 3120]

cp's OEIS Frontend

A090695 Integers which are not the sum of 2 integers A and B with AB+1 and AB-1 both primes. In other words, the product cannot be the middle integer of a Twin Prime pair.

Table of values

List of values