A331185 - cp's OEIS frontend

A331185 a(n) = n - prime(A067004(n)), where A067004 is the ordinal transform of number of divisors of n (A000005).

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

[-1, 0, 0, 2, 0, 4, 0, 5, 6, 5, 0, 10, 0, 7, 4, 14, 0, 15, 0, 15, 8, 5, 0, 22, 20, 7, 4, 21, 0, 27, 0, 21, 4, 3, -2, 34, 0, -3, -4, 35, 0, 35, 0, 31, 28, -1, 0, 46, 42, 31, -2, 29, 0, 43, -4, 43, -4, -9, 0, 58, 0, -9, 34, 62, -8, 49, 0, 37, -10, 51, 0, 69, 0, -9, 38, 35, -12, 55, 0, 77, 78, -15, 0, 79, -16, -17, -20, 59, 0, 83]

cp's OEIS Frontend

A331185 a(n) = n - prime(A067004(n)), where A067004 is the ordinal transform of number of divisors of n (A000005).

Table of values

List of values

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

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

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