A131802 - cp's OEIS frontend

A131802 Sequence related to factorizations and prime signatures: a(1) = 1; for n>1, a(n) = A057567(n) - 2*A001055(n).

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

[1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 3, 0, 1, 1, 2, 0, 3, 0, 3, 1, 1, 0, 7, 0, 1, 1, 3, 0, 5, 0, 5, 1, 1, 1, 8, 0, 1, 1, 7, 0, 5, 0, 3, 3, 1, 0, 14, 0, 3, 1, 3, 0, 7, 1, 7, 1, 1, 0, 14, 0, 1, 3, 8, 1, 5, 0, 3, 1, 5, 0, 20, 0, 1, 3, 3, 1, 5, 0, 14, 2, 1, 0, 14, 1, 1, 1, 7]

cp's OEIS Frontend

A131802 Sequence related to factorizations and prime signatures: a(1) = 1; for n>1, a(n) = A057567(n) - 2*A001055(n).

Table of values

List of values

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

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

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