A282445 - cp's OEIS frontend

A282445 For n>=5, a(n) is the smallest m>=3 such that odd part of ((prime(n)^2 - prime(m)^2)/3) is prime, or a(n)=0 if there is no such m

n	a(n)
5	4
6	3
7	3
8	3
9	4
10	3
11	4
12	3
13	4
14	3
15	7
16	3
17	12
18	6
19	8
20	4
21	13
22	7
23	8
24	4
25	11
26	3
27	20
28	5
29	6
30	22
31	11
32	23
33	13
34	16
35	14
36	9
37	10
38	10
39	24
40	29
41	6
42	40
43	31
44	0
45	3
46	4
47	40
48	11
49	32
50	45
51	13
52	7
53	30
54	3
55	53
56	20
57	6
58	30
59	35
60	27
61	54
62	26
63	0
64	63
65	46
66	57
67	16
68	67
69	67
70	38
71	0
72	39
73	52
74	5
75	61
76	75
77	3

[4, 3, 3, 3, 4, 3, 4, 3, 4, 3, 7, 3, 12, 6, 8, 4, 13, 7, 8, 4, 11, 3, 20, 5, 6, 22, 11, 23, 13, 16, 14, 9, 10, 10, 24, 29, 6, 40, 31, 0, 3, 4, 40, 11, 32, 45, 13, 7, 30, 3, 53, 20, 6, 30, 35, 27, 54, 26, 0, 63, 46, 57, 16, 67, 67, 38, 0, 39, 52, 5, 61, 75, 3]

cp's OEIS Frontend

A282445 For n>=5, a(n) is the smallest m>=3 such that odd part of ((prime(n)^2 - prime(m)^2)/3) is prime, or a(n)=0 if there is no such m

Table of values

List of values

n	a(n)
5	4
6	3
7	3
8	3
9	4
10	3
11	4
12	3
13	4
14	3
15	7
16	3
17	12
18	6
19	8
20	4
21	13
22	7
23	8
24	4
25	11
26	3
27	20
28	5
29	6
30	22
31	11
32	23
33	13
34	16
35	14
36	9
37	10
38	10
39	24
40	29
41	6
42	40
43	31
44	0
45	3
46	4
47	40
48	11
49	32
50	45
51	13
52	7
53	30
54	3
55	53
56	20
57	6
58	30
59	35
60	27
61	54
62	26
63	0
64	63
65	46
66	57
67	16
68	67
69	67
70	38
71	0
72	39
73	52
74	5
75	61
76	75
77	3

n	a(n)
5	4
6	3
7	3
8	3
9	4
10	3
11	4
12	3
13	4
14	3
15	7
16	3
17	12
18	6
19	8
20	4
21	13
22	7
23	8
24	4
25	11
26	3
27	20
28	5
29	6
30	22
31	11
32	23
33	13
34	16
35	14
36	9
37	10
38	10
39	24
40	29
41	6
42	40
43	31
44	0
45	3
46	4
47	40
48	11
49	32
50	45
51	13
52	7
53	30
54	3
55	53
56	20
57	6
58	30
59	35
60	27
61	54
62	26
63	0
64	63
65	46
66	57
67	16
68	67
69	67
70	38
71	0
72	39
73	52
74	5
75	61
76	75
77	3

n	a(n)
5	4
6	3
7	3
8	3
9	4
10	3
11	4
12	3
13	4
14	3
15	7
16	3
17	12
18	6
19	8
20	4
21	13
22	7
23	8
24	4
25	11
26	3
27	20
28	5
29	6
30	22
31	11
32	23
33	13
34	16
35	14
36	9
37	10
38	10
39	24
40	29
41	6
42	40
43	31
44	0
45	3
46	4
47	40
48	11
49	32
50	45
51	13
52	7
53	30
54	3
55	53
56	20
57	6
58	30
59	35
60	27
61	54
62	26
63	0
64	63
65	46
66	57
67	16
68	67
69	67
70	38
71	0
72	39
73	52
74	5
75	61
76	75
77	3