A238778 - cp's OEIS frontend

A238778 Sum of all primes p such that 2n - p is also a prime.

n	a(n)
2	2
3	3
4	8
5	15
6	12
7	21
8	32
9	36
10	40
11	55
12	72
13	65
14	56
15	90
16	64
17	119
18	144
19	57
20	120
21	168
22	132
23	161
24	240
25	200
26	156
27	270
28	168
29	203
30	360
31	155
32	320
33	396
34	136
35	350
36	432
37	333
38	380
39	546
40	320
41	369
42	672
43	387
44	352
45	810
46	368
47	423
48	672
49	294
50	600
51	816
52	520
53	583
54	864
55	660
56	784

[2, 3, 8, 15, 12, 21, 32, 36, 40, 55, 72, 65, 56, 90, 64, 119, 144, 57, 120, 168, 132, 161, 240, 200, 156, 270, 168, 203, 360, 155, 320, 396, 136, 350, 432, 333, 380, 546, 320, 369, 672, 387, 352, 810, 368, 423, 672, 294, 600, 816, 520, 583, 864, 660, 784]

cp's OEIS Frontend

A238778 Sum of all primes p such that 2n - p is also a prime.

Table of values

List of values

n	a(n)
2	2
3	3
4	8
5	15
6	12
7	21
8	32
9	36
10	40
11	55
12	72
13	65
14	56
15	90
16	64
17	119
18	144
19	57
20	120
21	168
22	132
23	161
24	240
25	200
26	156
27	270
28	168
29	203
30	360
31	155
32	320
33	396
34	136
35	350
36	432
37	333
38	380
39	546
40	320
41	369
42	672
43	387
44	352
45	810
46	368
47	423
48	672
49	294
50	600
51	816
52	520
53	583
54	864
55	660
56	784

n	a(n)
2	2
3	3
4	8
5	15
6	12
7	21
8	32
9	36
10	40
11	55
12	72
13	65
14	56
15	90
16	64
17	119
18	144
19	57
20	120
21	168
22	132
23	161
24	240
25	200
26	156
27	270
28	168
29	203
30	360
31	155
32	320
33	396
34	136
35	350
36	432
37	333
38	380
39	546
40	320
41	369
42	672
43	387
44	352
45	810
46	368
47	423
48	672
49	294
50	600
51	816
52	520
53	583
54	864
55	660
56	784

n	a(n)
2	2
3	3
4	8
5	15
6	12
7	21
8	32
9	36
10	40
11	55
12	72
13	65
14	56
15	90
16	64
17	119
18	144
19	57
20	120
21	168
22	132
23	161
24	240
25	200
26	156
27	270
28	168
29	203
30	360
31	155
32	320
33	396
34	136
35	350
36	432
37	333
38	380
39	546
40	320
41	369
42	672
43	387
44	352
45	810
46	368
47	423
48	672
49	294
50	600
51	816
52	520
53	583
54	864
55	660
56	784