A129699 - cp's OEIS frontend

A129699 Least nonnegative m such that P(n+3,n) + P(n+3,m) is prime where P(k,n) is n-th k-gonal number, or -1 if no such value exists.

n	a(n)
0	2
1	1
2	0
3	4
4	2
5	2
6	4
7	4
8	2
9	4
10	3
11	6
12	73
13	4
14	3
15	16
16	9
17	6
18	7
19	2
20	17
21	10
22	3
23	2
24	10
25	2
26	36
27	58
28	9
29	2
30	7
31	4
32	6
33	82
34	3
35	2
36	25
37	4
38	11
39	10
40	2
41	6
42	43
43	2
44	14
45	46
46	11
47	38
48	37
49	2
50	32
51	130
52	14
53	2
54	28
55	2
56	5
57	28
58	4
59	14
60	37
61	16
62	24
63	16
64	2
65	2
66	40
67	4
68	2
69	10
70	8
71	6
72	46
73	22
74	3
75	28
76	5
77	18
78	16
79	2
80	26
81	10
82	19
83	12
84	10
85	8

[2, 1, 0, 4, 2, 2, 4, 4, 2, 4, 3, 6, 73, 4, 3, 16, 9, 6, 7, 2, 17, 10, 3, 2, 10, 2, 36, 58, 9, 2, 7, 4, 6, 82, 3, 2, 25, 4, 11, 10, 2, 6, 43, 2, 14, 46, 11, 38, 37, 2, 32, 130, 14, 2, 28, 2, 5, 28, 4, 14, 37, 16, 24, 16, 2, 2, 40, 4, 2, 10, 8, 6, 46, 22, 3, 28, 5, 18, 16, 2, 26, 10, 19, 12, 10, 8]

cp's OEIS Frontend

A129699 Least nonnegative m such that P(n+3,n) + P(n+3,m) is prime where P(k,n) is n-th k-gonal number, or -1 if no such value exists.

Table of values

List of values

n	a(n)
0	2
1	1
2	0
3	4
4	2
5	2
6	4
7	4
8	2
9	4
10	3
11	6
12	73
13	4
14	3
15	16
16	9
17	6
18	7
19	2
20	17
21	10
22	3
23	2
24	10
25	2
26	36
27	58
28	9
29	2
30	7
31	4
32	6
33	82
34	3
35	2
36	25
37	4
38	11
39	10
40	2
41	6
42	43
43	2
44	14
45	46
46	11
47	38
48	37
49	2
50	32
51	130
52	14
53	2
54	28
55	2
56	5
57	28
58	4
59	14
60	37
61	16
62	24
63	16
64	2
65	2
66	40
67	4
68	2
69	10
70	8
71	6
72	46
73	22
74	3
75	28
76	5
77	18
78	16
79	2
80	26
81	10
82	19
83	12
84	10
85	8

n	a(n)
0	2
1	1
2	0
3	4
4	2
5	2
6	4
7	4
8	2
9	4
10	3
11	6
12	73
13	4
14	3
15	16
16	9
17	6
18	7
19	2
20	17
21	10
22	3
23	2
24	10
25	2
26	36
27	58
28	9
29	2
30	7
31	4
32	6
33	82
34	3
35	2
36	25
37	4
38	11
39	10
40	2
41	6
42	43
43	2
44	14
45	46
46	11
47	38
48	37
49	2
50	32
51	130
52	14
53	2
54	28
55	2
56	5
57	28
58	4
59	14
60	37
61	16
62	24
63	16
64	2
65	2
66	40
67	4
68	2
69	10
70	8
71	6
72	46
73	22
74	3
75	28
76	5
77	18
78	16
79	2
80	26
81	10
82	19
83	12
84	10
85	8

n	a(n)
0	2
1	1
2	0
3	4
4	2
5	2
6	4
7	4
8	2
9	4
10	3
11	6
12	73
13	4
14	3
15	16
16	9
17	6
18	7
19	2
20	17
21	10
22	3
23	2
24	10
25	2
26	36
27	58
28	9
29	2
30	7
31	4
32	6
33	82
34	3
35	2
36	25
37	4
38	11
39	10
40	2
41	6
42	43
43	2
44	14
45	46
46	11
47	38
48	37
49	2
50	32
51	130
52	14
53	2
54	28
55	2
56	5
57	28
58	4
59	14
60	37
61	16
62	24
63	16
64	2
65	2
66	40
67	4
68	2
69	10
70	8
71	6
72	46
73	22
74	3
75	28
76	5
77	18
78	16
79	2
80	26
81	10
82	19
83	12
84	10
85	8