A280683 - cp's OEIS frontend

A280683 Number of ways to write n as an ordered sum of two positive squarefree semiprimes (A006881).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	1
13	0
14	0
15	0
16	2
17	0
18	0
19	0
20	3
21	2
22	0
23	0
24	2
25	2
26	0
27	2
28	3
29	2
30	1
31	2
32	4
33	0
34	0
35	2
36	6
37	2
38	0
39	2
40	4
41	4
42	1
43	4
44	5
45	4
46	0
47	4
48	8
49	6
50	2
51	0
52	5
53	4
54	4
55	4
56	6
57	4
58	0
59	4
60	8
61	10
62	0
63	2
64	4
65	6
66	3
67	6
68	9
69	4
70	3
71	6
72	14
73	8
74	2
75	4
76	5
77	8
78	3
79	10
80	8
81	4
82	0
83	8
84	12
85	4
86	4
87	4
88	8
89	6
90	8
91	12
92	11
93	6
94	2
95	10
96	12
97	12
98	4
99	8
100	12
101	12
102	5
103	12
104	10
105	4
106	6

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

cp's OEIS Frontend

A280683 Number of ways to write n as an ordered sum of two positive squarefree semiprimes (A006881).

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	1
13	0
14	0
15	0
16	2
17	0
18	0
19	0
20	3
21	2
22	0
23	0
24	2
25	2
26	0
27	2
28	3
29	2
30	1
31	2
32	4
33	0
34	0
35	2
36	6
37	2
38	0
39	2
40	4
41	4
42	1
43	4
44	5
45	4
46	0
47	4
48	8
49	6
50	2
51	0
52	5
53	4
54	4
55	4
56	6
57	4
58	0
59	4
60	8
61	10
62	0
63	2
64	4
65	6
66	3
67	6
68	9
69	4
70	3
71	6
72	14
73	8
74	2
75	4
76	5
77	8
78	3
79	10
80	8
81	4
82	0
83	8
84	12
85	4
86	4
87	4
88	8
89	6
90	8
91	12
92	11
93	6
94	2
95	10
96	12
97	12
98	4
99	8
100	12
101	12
102	5
103	12
104	10
105	4
106	6

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	1
13	0
14	0
15	0
16	2
17	0
18	0
19	0
20	3
21	2
22	0
23	0
24	2
25	2
26	0
27	2
28	3
29	2
30	1
31	2
32	4
33	0
34	0
35	2
36	6
37	2
38	0
39	2
40	4
41	4
42	1
43	4
44	5
45	4
46	0
47	4
48	8
49	6
50	2
51	0
52	5
53	4
54	4
55	4
56	6
57	4
58	0
59	4
60	8
61	10
62	0
63	2
64	4
65	6
66	3
67	6
68	9
69	4
70	3
71	6
72	14
73	8
74	2
75	4
76	5
77	8
78	3
79	10
80	8
81	4
82	0
83	8
84	12
85	4
86	4
87	4
88	8
89	6
90	8
91	12
92	11
93	6
94	2
95	10
96	12
97	12
98	4
99	8
100	12
101	12
102	5
103	12
104	10
105	4
106	6

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	1
13	0
14	0
15	0
16	2
17	0
18	0
19	0
20	3
21	2
22	0
23	0
24	2
25	2
26	0
27	2
28	3
29	2
30	1
31	2
32	4
33	0
34	0
35	2
36	6
37	2
38	0
39	2
40	4
41	4
42	1
43	4
44	5
45	4
46	0
47	4
48	8
49	6
50	2
51	0
52	5
53	4
54	4
55	4
56	6
57	4
58	0
59	4
60	8
61	10
62	0
63	2
64	4
65	6
66	3
67	6
68	9
69	4
70	3
71	6
72	14
73	8
74	2
75	4
76	5
77	8
78	3
79	10
80	8
81	4
82	0
83	8
84	12
85	4
86	4
87	4
88	8
89	6
90	8
91	12
92	11
93	6
94	2
95	10
96	12
97	12
98	4
99	8
100	12
101	12
102	5
103	12
104	10
105	4
106	6