A377983 - cp's OEIS frontend

A377983 a(n) is the number of terms in the range of A276087 that are <= n, where A276087(n) = A276086(A276086(n)) [the twofold application of the primorial base exp-function].

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

[0, 0, 1, 2, 2, 3, 4, 5, 5, 5, 6, 7, 7, 8, 9, 9, 9, 10, 11, 12, 12, 12, 13, 14, 14, 14, 15, 15, 15, 16, 17, 18, 18, 18, 19, 19, 19, 20, 21, 21, 21, 22, 23, 24, 24, 25, 26, 27, 27, 27, 28, 28, 28, 29, 29, 29, 29, 29, 30, 31, 31, 32, 33, 34, 34, 34, 35, 36, 36, 36, 37, 38, 38, 39, 40, 41, 41, 41, 42, 43, 43, 43, 44, 45]

cp's OEIS Frontend

A377983 a(n) is the number of terms in the range of A276087 that are <= n, where A276087(n) = A276086(A276086(n)) [the twofold application of the primorial base exp-function].

Table of values

List of values

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

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

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