A377780 - cp's OEIS frontend

A377780 First differences of A000015 (smallest prime-power >= n).

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

[0, 1, 1, 1, 2, 0, 1, 1, 2, 0, 2, 0, 3, 0, 0, 1, 2, 0, 4, 0, 0, 0, 2, 0, 2, 0, 2, 0, 2, 0, 1, 5, 0, 0, 0, 0, 4, 0, 0, 0, 2, 0, 4, 0, 0, 0, 2, 0, 4, 0, 0, 0, 6, 0, 0, 0, 0, 0, 2, 0, 3, 0, 0, 3, 0, 0, 4, 0, 0, 0, 2, 0, 6, 0, 0, 0, 0, 0, 2, 0, 2, 0, 6, 0, 0, 0, 0]

cp's OEIS Frontend

A377780 First differences of A000015 (smallest prime-power >= n).

Table of values

List of values

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

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

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