A154804 - cp's OEIS frontend

A154804 Number of ways to represent 2*n as the sum of two distinct primes (counting 1 as a prime).

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	3
10	3
11	2
12	4
13	2
14	2
15	4
16	3
17	3
18	4
19	2
20	3
21	5
22	4
23	3
24	6
25	4
26	3
27	6
28	3
29	3
30	7
31	3
32	5
33	6
34	3
35	5
36	7
37	5
38	5
39	7
40	5
41	4
42	9
43	4
44	4
45	10
46	4
47	4
48	7
49	4
50	6
51	9
52	6
53	5
54	9
55	7
56	7
57	11
58	6
59	5
60	12
61	3
62	5
63	10
64	4
65	7
66	10
67	5
68	5
69	9
70	8
71	7
72	11
73	5
74	5
75	13
76	5
77	8
78	11
79	5
80	8
81	10
82	6
83	5
84	14
85	9
86	6
87	12
88	7
89	6
90	15
91	7
92	8
93	13
94	5
95	8
96	12
97	7
98	9

[0, 1, 1, 2, 1, 2, 2, 2, 3, 3, 2, 4, 2, 2, 4, 3, 3, 4, 2, 3, 5, 4, 3, 6, 4, 3, 6, 3, 3, 7, 3, 5, 6, 3, 5, 7, 5, 5, 7, 5, 4, 9, 4, 4, 10, 4, 4, 7, 4, 6, 9, 6, 5, 9, 7, 7, 11, 6, 5, 12, 3, 5, 10, 4, 7, 10, 5, 5, 9, 8, 7, 11, 5, 5, 13, 5, 8, 11, 5, 8, 10, 6, 5, 14, 9, 6, 12, 7, 6, 15, 7, 8, 13, 5, 8, 12, 7, 9]

cp's OEIS Frontend

A154804 Number of ways to represent 2*n as the sum of two distinct primes (counting 1 as a prime).

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	3
10	3
11	2
12	4
13	2
14	2
15	4
16	3
17	3
18	4
19	2
20	3
21	5
22	4
23	3
24	6
25	4
26	3
27	6
28	3
29	3
30	7
31	3
32	5
33	6
34	3
35	5
36	7
37	5
38	5
39	7
40	5
41	4
42	9
43	4
44	4
45	10
46	4
47	4
48	7
49	4
50	6
51	9
52	6
53	5
54	9
55	7
56	7
57	11
58	6
59	5
60	12
61	3
62	5
63	10
64	4
65	7
66	10
67	5
68	5
69	9
70	8
71	7
72	11
73	5
74	5
75	13
76	5
77	8
78	11
79	5
80	8
81	10
82	6
83	5
84	14
85	9
86	6
87	12
88	7
89	6
90	15
91	7
92	8
93	13
94	5
95	8
96	12
97	7
98	9

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	3
10	3
11	2
12	4
13	2
14	2
15	4
16	3
17	3
18	4
19	2
20	3
21	5
22	4
23	3
24	6
25	4
26	3
27	6
28	3
29	3
30	7
31	3
32	5
33	6
34	3
35	5
36	7
37	5
38	5
39	7
40	5
41	4
42	9
43	4
44	4
45	10
46	4
47	4
48	7
49	4
50	6
51	9
52	6
53	5
54	9
55	7
56	7
57	11
58	6
59	5
60	12
61	3
62	5
63	10
64	4
65	7
66	10
67	5
68	5
69	9
70	8
71	7
72	11
73	5
74	5
75	13
76	5
77	8
78	11
79	5
80	8
81	10
82	6
83	5
84	14
85	9
86	6
87	12
88	7
89	6
90	15
91	7
92	8
93	13
94	5
95	8
96	12
97	7
98	9

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	3
10	3
11	2
12	4
13	2
14	2
15	4
16	3
17	3
18	4
19	2
20	3
21	5
22	4
23	3
24	6
25	4
26	3
27	6
28	3
29	3
30	7
31	3
32	5
33	6
34	3
35	5
36	7
37	5
38	5
39	7
40	5
41	4
42	9
43	4
44	4
45	10
46	4
47	4
48	7
49	4
50	6
51	9
52	6
53	5
54	9
55	7
56	7
57	11
58	6
59	5
60	12
61	3
62	5
63	10
64	4
65	7
66	10
67	5
68	5
69	9
70	8
71	7
72	11
73	5
74	5
75	13
76	5
77	8
78	11
79	5
80	8
81	10
82	6
83	5
84	14
85	9
86	6
87	12
88	7
89	6
90	15
91	7
92	8
93	13
94	5
95	8
96	12
97	7
98	9