A039731 - cp's OEIS frontend

A039731 a(n) = max{prime(n) mod q, where prime q < prime(n) = n-th prime}.

n	a(n)
2	1
3	2
4	2
5	4
6	6
7	6
8	8
9	10
10	12
11	14
12	18
13	18
14	20
15	18
16	24
17	28
18	30
19	30
20	34
21	36
22	38
23	40
24	42
25	44
26	48
27	50
28	48
29	50
30	54
31	60
32	64
33	66
34	68
35	70
36	72
37	78
38	80
39	78
40	84
41	82
42	84
43	94
44	96
45	96
46	98
47	104
48	110
49	100
50	102
51	106
52	112
53	114
54	124
55	126
56	126
57	132
58	134
59	138
60	132
61	134
62	144
63	150

[1, 2, 2, 4, 6, 6, 8, 10, 12, 14, 18, 18, 20, 18, 24, 28, 30, 30, 34, 36, 38, 40, 42, 44, 48, 50, 48, 50, 54, 60, 64, 66, 68, 70, 72, 78, 80, 78, 84, 82, 84, 94, 96, 96, 98, 104, 110, 100, 102, 106, 112, 114, 124, 126, 126, 132, 134, 138, 132, 134, 144, 150]

cp's OEIS Frontend

A039731 a(n) = max{prime(n) mod q, where prime q < prime(n) = n-th prime}.

Table of values

List of values

n	a(n)
2	1
3	2
4	2
5	4
6	6
7	6
8	8
9	10
10	12
11	14
12	18
13	18
14	20
15	18
16	24
17	28
18	30
19	30
20	34
21	36
22	38
23	40
24	42
25	44
26	48
27	50
28	48
29	50
30	54
31	60
32	64
33	66
34	68
35	70
36	72
37	78
38	80
39	78
40	84
41	82
42	84
43	94
44	96
45	96
46	98
47	104
48	110
49	100
50	102
51	106
52	112
53	114
54	124
55	126
56	126
57	132
58	134
59	138
60	132
61	134
62	144
63	150

n	a(n)
2	1
3	2
4	2
5	4
6	6
7	6
8	8
9	10
10	12
11	14
12	18
13	18
14	20
15	18
16	24
17	28
18	30
19	30
20	34
21	36
22	38
23	40
24	42
25	44
26	48
27	50
28	48
29	50
30	54
31	60
32	64
33	66
34	68
35	70
36	72
37	78
38	80
39	78
40	84
41	82
42	84
43	94
44	96
45	96
46	98
47	104
48	110
49	100
50	102
51	106
52	112
53	114
54	124
55	126
56	126
57	132
58	134
59	138
60	132
61	134
62	144
63	150

n	a(n)
2	1
3	2
4	2
5	4
6	6
7	6
8	8
9	10
10	12
11	14
12	18
13	18
14	20
15	18
16	24
17	28
18	30
19	30
20	34
21	36
22	38
23	40
24	42
25	44
26	48
27	50
28	48
29	50
30	54
31	60
32	64
33	66
34	68
35	70
36	72
37	78
38	80
39	78
40	84
41	82
42	84
43	94
44	96
45	96
46	98
47	104
48	110
49	100
50	102
51	106
52	112
53	114
54	124
55	126
56	126
57	132
58	134
59	138
60	132
61	134
62	144
63	150