A283992 - cp's OEIS frontend

A283992 a(n) = number of irreducible Stern polynomials in range B(1,x) .. B(n,x). (Polynomial B_1(x) = 1 is not included in the count).

n	a(n)
1	0
2	1
3	2
4	2
5	3
6	3
7	4
8	4
9	4
10	4
11	5
12	5
13	6
14	6
15	6
16	6
17	7
18	7
19	8
20	8
21	8
22	8
23	9
24	9
25	10
26	10
27	10
28	10
29	11
30	11
31	12
32	12
33	12
34	12
35	12
36	12
37	13
38	13
39	13
40	13
41	14
42	14
43	15
44	15
45	15
46	15
47	16
48	16
49	16
50	16
51	16
52	16
53	17
54	17
55	18
56	18
57	18
58	18
59	19
60	19
61	20
62	20
63	20
64	20
65	21
66	21
67	22
68	22
69	22
70	22
71	23
72	23
73	24
74	24
75	24
76	24
77	25
78	25
79	26
80	26
81	26
82	26
83	27
84	27
85	27
86	27
87	27
88	27
89	28
90	28
91	29
92	29
93	29
94	29
95	30
96	30

[0, 1, 2, 2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 8, 8, 8, 8, 9, 9, 10, 10, 10, 10, 11, 11, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 17, 17, 18, 18, 18, 18, 19, 19, 20, 20, 20, 20, 21, 21, 22, 22, 22, 22, 23, 23, 24, 24, 24, 24, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 28, 28, 29, 29, 29, 29, 30, 30]

cp's OEIS Frontend

A283992 a(n) = number of irreducible Stern polynomials in range B(1,x) .. B(n,x). (Polynomial B_1(x) = 1 is not included in the count).

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	2
5	3
6	3
7	4
8	4
9	4
10	4
11	5
12	5
13	6
14	6
15	6
16	6
17	7
18	7
19	8
20	8
21	8
22	8
23	9
24	9
25	10
26	10
27	10
28	10
29	11
30	11
31	12
32	12
33	12
34	12
35	12
36	12
37	13
38	13
39	13
40	13
41	14
42	14
43	15
44	15
45	15
46	15
47	16
48	16
49	16
50	16
51	16
52	16
53	17
54	17
55	18
56	18
57	18
58	18
59	19
60	19
61	20
62	20
63	20
64	20
65	21
66	21
67	22
68	22
69	22
70	22
71	23
72	23
73	24
74	24
75	24
76	24
77	25
78	25
79	26
80	26
81	26
82	26
83	27
84	27
85	27
86	27
87	27
88	27
89	28
90	28
91	29
92	29
93	29
94	29
95	30
96	30

n	a(n)
1	0
2	1
3	2
4	2
5	3
6	3
7	4
8	4
9	4
10	4
11	5
12	5
13	6
14	6
15	6
16	6
17	7
18	7
19	8
20	8
21	8
22	8
23	9
24	9
25	10
26	10
27	10
28	10
29	11
30	11
31	12
32	12
33	12
34	12
35	12
36	12
37	13
38	13
39	13
40	13
41	14
42	14
43	15
44	15
45	15
46	15
47	16
48	16
49	16
50	16
51	16
52	16
53	17
54	17
55	18
56	18
57	18
58	18
59	19
60	19
61	20
62	20
63	20
64	20
65	21
66	21
67	22
68	22
69	22
70	22
71	23
72	23
73	24
74	24
75	24
76	24
77	25
78	25
79	26
80	26
81	26
82	26
83	27
84	27
85	27
86	27
87	27
88	27
89	28
90	28
91	29
92	29
93	29
94	29
95	30
96	30

n	a(n)
1	0
2	1
3	2
4	2
5	3
6	3
7	4
8	4
9	4
10	4
11	5
12	5
13	6
14	6
15	6
16	6
17	7
18	7
19	8
20	8
21	8
22	8
23	9
24	9
25	10
26	10
27	10
28	10
29	11
30	11
31	12
32	12
33	12
34	12
35	12
36	12
37	13
38	13
39	13
40	13
41	14
42	14
43	15
44	15
45	15
46	15
47	16
48	16
49	16
50	16
51	16
52	16
53	17
54	17
55	18
56	18
57	18
58	18
59	19
60	19
61	20
62	20
63	20
64	20
65	21
66	21
67	22
68	22
69	22
70	22
71	23
72	23
73	24
74	24
75	24
76	24
77	25
78	25
79	26
80	26
81	26
82	26
83	27
84	27
85	27
86	27
87	27
88	27
89	28
90	28
91	29
92	29
93	29
94	29
95	30
96	30