A339893 - cp's OEIS frontend

A339893 a(n) = A000523(n) - A001222(n); floor(log_2(n)) minus the number of prime divisors of n, counted with multiplicity.

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

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

cp's OEIS Frontend

A339893 a(n) = A000523(n) - A001222(n); floor(log_2(n)) minus the number of prime divisors of n, counted with multiplicity.

Table of values

List of values

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

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

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