A054860 - cp's OEIS frontend

A054860 Number of ways of writing 2n+1 as p + q + r where p, q, r are primes with p <= q <= r.

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

[0, 0, 0, 1, 2, 2, 2, 3, 4, 3, 5, 5, 5, 7, 7, 6, 9, 8, 9, 10, 11, 10, 12, 13, 12, 15, 16, 14, 17, 16, 16, 19, 21, 20, 20, 22, 21, 22, 28, 24, 25, 29, 27, 29, 33, 29, 33, 35, 34, 30, 38, 36, 35, 43, 38, 37, 47, 42, 43, 50, 46, 47, 53, 50, 45, 57, 54, 47, 62, 53, 49, 65, 59, 55, 68]

cp's OEIS Frontend

A054860 Number of ways of writing 2n+1 as p + q + r where p, q, r are primes with p <= q <= r.

Table of values

List of values

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

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

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