A285796 - cp's OEIS frontend

A285796 Number of ways to write n as an ordered sum of two numbers that are the product of an even number of distinct primes (including 1).

n	a(n)
0	0
1	0
2	1
3	0
4	0
5	0
6	0
7	2
8	0
9	0
10	0
11	2
12	1
13	0
14	0
15	2
16	4
17	0
18	0
19	0
20	3
21	2
22	2
23	2
24	2
25	2
26	0
27	4
28	3
29	2
30	1
31	2
32	4
33	0
34	2
35	4
36	8
37	2
38	0
39	4
40	6
41	4
42	1
43	4
44	5
45	4
46	0
47	6
48	8
49	6
50	2
51	0
52	7
53	4
54	4
55	4
56	8
57	4
58	2
59	6
60	8
61	10
62	0
63	4
64	4
65	6
66	5
67	6
68	9
69	4
70	5
71	6
72	14
73	8
74	2
75	6
76	5
77	8
78	5
79	10
80	8
81	4
82	0
83	10
84	12
85	4
86	6
87	6
88	10
89	6
90	8
91	12
92	13
93	6
94	4
95	12
96	14
97	12
98	4
99	8
100	12

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

cp's OEIS Frontend

A285796 Number of ways to write n as an ordered sum of two numbers that are the product of an even number of distinct primes (including 1).

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	0
4	0
5	0
6	0
7	2
8	0
9	0
10	0
11	2
12	1
13	0
14	0
15	2
16	4
17	0
18	0
19	0
20	3
21	2
22	2
23	2
24	2
25	2
26	0
27	4
28	3
29	2
30	1
31	2
32	4
33	0
34	2
35	4
36	8
37	2
38	0
39	4
40	6
41	4
42	1
43	4
44	5
45	4
46	0
47	6
48	8
49	6
50	2
51	0
52	7
53	4
54	4
55	4
56	8
57	4
58	2
59	6
60	8
61	10
62	0
63	4
64	4
65	6
66	5
67	6
68	9
69	4
70	5
71	6
72	14
73	8
74	2
75	6
76	5
77	8
78	5
79	10
80	8
81	4
82	0
83	10
84	12
85	4
86	6
87	6
88	10
89	6
90	8
91	12
92	13
93	6
94	4
95	12
96	14
97	12
98	4
99	8
100	12

n	a(n)
0	0
1	0
2	1
3	0
4	0
5	0
6	0
7	2
8	0
9	0
10	0
11	2
12	1
13	0
14	0
15	2
16	4
17	0
18	0
19	0
20	3
21	2
22	2
23	2
24	2
25	2
26	0
27	4
28	3
29	2
30	1
31	2
32	4
33	0
34	2
35	4
36	8
37	2
38	0
39	4
40	6
41	4
42	1
43	4
44	5
45	4
46	0
47	6
48	8
49	6
50	2
51	0
52	7
53	4
54	4
55	4
56	8
57	4
58	2
59	6
60	8
61	10
62	0
63	4
64	4
65	6
66	5
67	6
68	9
69	4
70	5
71	6
72	14
73	8
74	2
75	6
76	5
77	8
78	5
79	10
80	8
81	4
82	0
83	10
84	12
85	4
86	6
87	6
88	10
89	6
90	8
91	12
92	13
93	6
94	4
95	12
96	14
97	12
98	4
99	8
100	12

n	a(n)
0	0
1	0
2	1
3	0
4	0
5	0
6	0
7	2
8	0
9	0
10	0
11	2
12	1
13	0
14	0
15	2
16	4
17	0
18	0
19	0
20	3
21	2
22	2
23	2
24	2
25	2
26	0
27	4
28	3
29	2
30	1
31	2
32	4
33	0
34	2
35	4
36	8
37	2
38	0
39	4
40	6
41	4
42	1
43	4
44	5
45	4
46	0
47	6
48	8
49	6
50	2
51	0
52	7
53	4
54	4
55	4
56	8
57	4
58	2
59	6
60	8
61	10
62	0
63	4
64	4
65	6
66	5
67	6
68	9
69	4
70	5
71	6
72	14
73	8
74	2
75	6
76	5
77	8
78	5
79	10
80	8
81	4
82	0
83	10
84	12
85	4
86	6
87	6
88	10
89	6
90	8
91	12
92	13
93	6
94	4
95	12
96	14
97	12
98	4
99	8
100	12