A233739 - cp's OEIS frontend

A233739 R(n) - prime(2n), where R(n) is the n-th Ramanujan prime and prime(n) is the n-th prime.

n	a(n)
1	-1
2	4
3	4
4	10
5	12
6	10
7	16
8	14
9	10
10	26
11	22
12	18
13	26
14	42
15	38
16	36
17	40
18	30
19	64
20	56
21	52
22	46
23	42
24	40
25	40
26	42
27	56
28	48
29	76
30	68
31	74
32	62
33	84
34	72
35	70
36	72
37	60
38	56
39	64
40	78
41	70
42	70
43	126
44	114
45	124
46	114
47	108
48	98
49	86
50	100
51	86
52	78
53	76
54	66

[-1, 4, 4, 10, 12, 10, 16, 14, 10, 26, 22, 18, 26, 42, 38, 36, 40, 30, 64, 56, 52, 46, 42, 40, 40, 42, 56, 48, 76, 68, 74, 62, 84, 72, 70, 72, 60, 56, 64, 78, 70, 70, 126, 114, 124, 114, 108, 98, 86, 100, 86, 78, 76, 66]

cp's OEIS Frontend

A233739 R(n) - prime(2n), where R(n) is the n-th Ramanujan prime and prime(n) is the n-th prime.

Table of values

List of values

n	a(n)
1	-1
2	4
3	4
4	10
5	12
6	10
7	16
8	14
9	10
10	26
11	22
12	18
13	26
14	42
15	38
16	36
17	40
18	30
19	64
20	56
21	52
22	46
23	42
24	40
25	40
26	42
27	56
28	48
29	76
30	68
31	74
32	62
33	84
34	72
35	70
36	72
37	60
38	56
39	64
40	78
41	70
42	70
43	126
44	114
45	124
46	114
47	108
48	98
49	86
50	100
51	86
52	78
53	76
54	66

n	a(n)
1	-1
2	4
3	4
4	10
5	12
6	10
7	16
8	14
9	10
10	26
11	22
12	18
13	26
14	42
15	38
16	36
17	40
18	30
19	64
20	56
21	52
22	46
23	42
24	40
25	40
26	42
27	56
28	48
29	76
30	68
31	74
32	62
33	84
34	72
35	70
36	72
37	60
38	56
39	64
40	78
41	70
42	70
43	126
44	114
45	124
46	114
47	108
48	98
49	86
50	100
51	86
52	78
53	76
54	66

n	a(n)
1	-1
2	4
3	4
4	10
5	12
6	10
7	16
8	14
9	10
10	26
11	22
12	18
13	26
14	42
15	38
16	36
17	40
18	30
19	64
20	56
21	52
22	46
23	42
24	40
25	40
26	42
27	56
28	48
29	76
30	68
31	74
32	62
33	84
34	72
35	70
36	72
37	60
38	56
39	64
40	78
41	70
42	70
43	126
44	114
45	124
46	114
47	108
48	98
49	86
50	100
51	86
52	78
53	76
54	66