A059998 - cp's OEIS frontend

A059998 Number of different primes occurring when n is expressed as p1+q1+r1 = ... = pk+qk+rk where pk,qk,rk are primes with pk <= qk <= rk.

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

[0, 0, 0, 0, 0, 1, 2, 2, 3, 3, 4, 4, 3, 3, 5, 4, 6, 5, 5, 5, 7, 5, 8, 6, 7, 7, 9, 6, 8, 5, 8, 7, 10, 5, 11, 8, 10, 9, 10, 4, 12, 7, 11, 9, 13, 7, 14, 8, 13, 11, 15, 9, 14, 7, 14, 11, 16, 7, 15, 8, 15, 13, 17, 6, 18, 11, 17, 13, 17, 5, 19, 11, 18, 13, 20, 10, 21, 11, 20, 15, 20, 9, 22, 10, 21]

cp's OEIS Frontend

A059998 Number of different primes occurring when n is expressed as p1+q1+r1 = ... = pk+qk+rk where pk,qk,rk are primes with pk <= qk <= rk.

Table of values

List of values

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

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

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