A175508 - cp's OEIS frontend

A175508 a(n) is the difference of n and the product of the indices of prime factors of n with multiplicity, a(1) = 0.

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

[1, 1, 1, 3, 2, 4, 3, 7, 5, 7, 6, 10, 7, 10, 9, 15, 10, 14, 11, 17, 13, 17, 14, 22, 16, 20, 19, 24, 19, 24, 20, 31, 23, 27, 23, 32, 25, 30, 27, 37, 28, 34, 29, 39, 33, 37, 32, 46, 33, 41, 37, 46, 37, 46, 40, 52, 41, 48, 42, 54, 43, 51, 47, 63, 47, 56, 48, 61, 51, 58, 51, 68, 52, 62]

cp's OEIS Frontend

A175508 a(n) is the difference of n and the product of the indices of prime factors of n with multiplicity, a(1) = 0.

Table of values

List of values

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

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

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