A320655 - cp's OEIS frontend

A320655 Number of factorizations of n into semiprimes. Number of multiset partitions of the multiset of prime factors of n, into pairs.

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

[1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 2, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 2, 1, 1, 1, 1, 0, 2, 1, 0, 1, 1, 1, 1, 0, 0, 0, 2, 0, 0, 0, 1, 0]

cp's OEIS Frontend

A320655 Number of factorizations of n into semiprimes. Number of multiset partitions of the multiset of prime factors of n, into pairs.

Table of values

List of values

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

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

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