A069585 - cp's OEIS frontend

A069585 a(n) = n - largest prime power <= n.

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

[0, 1, 2, 0, 1, 2, 3, 0, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 0]

cp's OEIS Frontend

A069585 a(n) = n - largest prime power <= n.

Table of values

List of values

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

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

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