A214154 - cp's OEIS frontend

A214154 Number of ways to represent 2n as the sum of two distinct k-almost primes: #{m A001222(m)=A001222(2n-m)}.

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

[0, 0, 0, 1, 2, 1, 2, 3, 3, 4, 2, 5, 4, 4, 6, 5, 4, 8, 4, 8, 7, 6, 5, 12, 8, 7, 8, 8, 7, 15, 6, 13, 9, 7, 11, 18, 9, 11, 14, 14, 8, 18, 12, 12, 19, 11, 12, 21, 9, 18, 14, 16, 13, 21, 16, 19, 16, 17, 13, 34, 12, 15, 22, 20, 15, 23, 14, 17, 17, 22]

cp's OEIS Frontend

A214154 Number of ways to represent 2n as the sum of two distinct k-almost primes: #{m A001222(m)=A001222(2n-m)}.

Table of values

List of values

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

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

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