A382707 - cp's OEIS frontend

A382707 a(n) = number of indices k, 1 <= k <= n, such that A064413(k) < k.

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	1
8	1
9	1
10	2
11	2
12	2
13	2
14	3
15	3
16	3
17	4
18	4
19	4
20	5
21	5
22	5
23	5
24	5
25	5
26	5
27	6
28	7
29	7
30	7
31	7
32	7
33	8
34	8
35	8
36	8
37	9
38	9
39	9
40	9
41	9
42	9
43	10
44	10
45	10
46	10
47	10
48	10
49	10
50	11
51	11
52	11
53	11
54	11
55	11
56	11
57	12
58	12
59	12
60	12
61	13
62	13
63	13
64	13
65	13
66	13
67	14
68	14
69	14
70	14
71	14
72	14
73	14
74	15
75	15
76	15
77	15
78	16
79	16
80	16
81	17
82	17
83	17
84	17
85	17
86	17
87	17
88	17
89	18
90	18
91	18
92	18
93	19

[0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 19]

cp's OEIS Frontend

A382707 a(n) = number of indices k, 1 <= k <= n, such that A064413(k) < k.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	1
8	1
9	1
10	2
11	2
12	2
13	2
14	3
15	3
16	3
17	4
18	4
19	4
20	5
21	5
22	5
23	5
24	5
25	5
26	5
27	6
28	7
29	7
30	7
31	7
32	7
33	8
34	8
35	8
36	8
37	9
38	9
39	9
40	9
41	9
42	9
43	10
44	10
45	10
46	10
47	10
48	10
49	10
50	11
51	11
52	11
53	11
54	11
55	11
56	11
57	12
58	12
59	12
60	12
61	13
62	13
63	13
64	13
65	13
66	13
67	14
68	14
69	14
70	14
71	14
72	14
73	14
74	15
75	15
76	15
77	15
78	16
79	16
80	16
81	17
82	17
83	17
84	17
85	17
86	17
87	17
88	17
89	18
90	18
91	18
92	18
93	19

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	1
8	1
9	1
10	2
11	2
12	2
13	2
14	3
15	3
16	3
17	4
18	4
19	4
20	5
21	5
22	5
23	5
24	5
25	5
26	5
27	6
28	7
29	7
30	7
31	7
32	7
33	8
34	8
35	8
36	8
37	9
38	9
39	9
40	9
41	9
42	9
43	10
44	10
45	10
46	10
47	10
48	10
49	10
50	11
51	11
52	11
53	11
54	11
55	11
56	11
57	12
58	12
59	12
60	12
61	13
62	13
63	13
64	13
65	13
66	13
67	14
68	14
69	14
70	14
71	14
72	14
73	14
74	15
75	15
76	15
77	15
78	16
79	16
80	16
81	17
82	17
83	17
84	17
85	17
86	17
87	17
88	17
89	18
90	18
91	18
92	18
93	19

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	1
8	1
9	1
10	2
11	2
12	2
13	2
14	3
15	3
16	3
17	4
18	4
19	4
20	5
21	5
22	5
23	5
24	5
25	5
26	5
27	6
28	7
29	7
30	7
31	7
32	7
33	8
34	8
35	8
36	8
37	9
38	9
39	9
40	9
41	9
42	9
43	10
44	10
45	10
46	10
47	10
48	10
49	10
50	11
51	11
52	11
53	11
54	11
55	11
56	11
57	12
58	12
59	12
60	12
61	13
62	13
63	13
64	13
65	13
66	13
67	14
68	14
69	14
70	14
71	14
72	14
73	14
74	15
75	15
76	15
77	15
78	16
79	16
80	16
81	17
82	17
83	17
84	17
85	17
86	17
87	17
88	17
89	18
90	18
91	18
92	18
93	19