A061394 - cp's OEIS frontend

A061394 Number of distinct prime factors of n-th least prime signature (A025487); also a(n)-th prime is largest prime factor of n-th least prime signature; also a(n)-th primorial number is largest primorial factor of n-th least product of primorial numbers.

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

[0, 1, 1, 2, 1, 2, 1, 2, 3, 1, 2, 2, 3, 1, 2, 2, 3, 1, 2, 3, 2, 4, 2, 3, 1, 2, 3, 2, 4, 2, 3, 1, 2, 3, 2, 4, 2, 3, 3, 1, 3, 2, 4, 2, 3, 2, 4, 2, 3, 3, 1, 3, 2, 5, 4, 2, 3, 2, 4, 2, 3, 3, 1, 3, 2, 5, 4, 2, 3, 3, 2, 4, 3, 4, 2, 3, 4, 3, 2, 1, 3, 2, 5, 4, 2, 3, 3, 2, 4, 3, 4, 2, 5, 3, 4, 3, 2, 1, 3, 2, 5, 4, 2, 3, 3]

cp's OEIS Frontend

A061394 Number of distinct prime factors of n-th least prime signature (A025487); also a(n)-th prime is largest prime factor of n-th least prime signature; also a(n)-th primorial number is largest primorial factor of n-th least product of primorial numbers.

Table of values

List of values

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

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

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