A387136 - cp's OEIS frontend

A387136 Number of ways to choose a sequence of distinct prime factors, one of each prime index of 2n - 1.

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

[1, 1, 1, 1, 0, 1, 2, 1, 1, 1, 0, 1, 0, 0, 2, 1, 1, 1, 2, 1, 1, 2, 0, 2, 0, 1, 1, 1, 0, 1, 2, 0, 1, 1, 1, 2, 2, 0, 1, 2, 0, 1, 1, 1, 2, 1, 1, 1, 1, 0, 2, 1, 0, 2, 1, 1, 3, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 2, 2, 2, 2, 2, 0, 2, 2, 0, 1, 1, 0, 1, 2, 1, 2, 2, 0, 2]

cp's OEIS Frontend

A387136 Number of ways to choose a sequence of distinct prime factors, one of each prime index of 2n - 1.

Table of values

List of values

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

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

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