A212172 - cp's OEIS frontend

A212172 Row n of table represents second signature of n: list of exponents >= 2 in canonical prime factorization of n, in nonincreasing order, or 0 if no such exponent exists.

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

[0, 0, 0, 2, 0, 0, 0, 3, 2, 0, 0, 2, 0, 0, 0, 4, 0, 2, 0, 2, 0, 0, 0, 3, 2, 0, 3, 2, 0, 0, 0, 5, 0, 0, 0, 2, 2, 0, 0, 0, 3, 0, 0, 0, 2, 2, 0, 0, 4, 2, 2, 0, 2, 0, 3, 0, 3, 0, 0, 0, 2, 0, 0, 2, 6, 0, 0, 0, 2, 0, 0, 0, 3, 2, 0, 0, 2, 2, 0, 0, 0, 4, 4, 0, 0, 2, 0, 0]

cp's OEIS Frontend

A212172 Row n of table represents second signature of n: list of exponents >= 2 in canonical prime factorization of n, in nonincreasing order, or 0 if no such exponent exists.

Table of values

List of values

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

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

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