A381104 - cp's OEIS frontend

A381104 a(n) is the number of prime factors with exponent 1 in the prime factorization of the n-th superabundant number.

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

[0, 1, 0, 2, 1, 1, 0, 1, 2, 2, 1, 2, 1, 1, 3, 2, 3, 2, 2, 2, 2, 1, 3, 3, 3, 3, 2, 3, 2, 3, 4, 4, 4, 3, 4, 3, 4, 3, 3, 5, 4, 5, 4, 5, 4, 4, 6, 4, 4, 5, 6, 5, 6, 5, 5, 5, 5, 5, 5, 4, 6, 6, 6, 6, 6, 6, 5, 6, 5, 5, 5, 7, 5, 7, 7, 7, 7, 6, 7, 6, 6, 6, 8, 6, 8, 8, 8, 8, 7, 8, 7, 7, 7, 7, 9, 7, 9, 7, 7, 9, 8, 9, 8, 8, 8]

cp's OEIS Frontend

A381104 a(n) is the number of prime factors with exponent 1 in the prime factorization of the n-th superabundant number.

Table of values

List of values

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

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

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