A212178 - cp's OEIS frontend

A212178 Number of exponents >= 2 in canonical prime factorization of A025487(n) (first integer of each prime signature).

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

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

cp's OEIS Frontend

A212178 Number of exponents >= 2 in canonical prime factorization of A025487(n) (first integer of each prime signature).

Table of values

List of values

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

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

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