A377782 - cp's OEIS frontend

A377782 First-differences of A031218(n) = greatest number <= n that is 1 or a prime-power.

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

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

cp's OEIS Frontend

A377782 First-differences of A031218(n) = greatest number <= n that is 1 or a prime-power.

Table of values

List of values

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

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

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