A012264 - cp's OEIS frontend

A012264 Number of real roots of x - x^3/3! + x^5/5! - ... + (-1)^n*x^(2n+1)/(2n+1)!.

n	a(n)
0	1
1	3
2	1
3	3
4	5
5	3
6	5
7	7
8	5
9	7
10	5
11	7
12	9
13	7
14	9
15	7
16	9
17	11
18	9
19	11
20	13
21	11
22	13
23	11
24	13
25	15
26	13
27	15
28	17
29	15
30	17
31	15
32	17
33	19
34	17
35	19
36	17
37	19
38	21
39	19
40	21
41	23
42	21
43	23
44	21
45	23
46	25
47	23
48	25
49	23
50	25
51	27
52	25
53	27
54	29
55	27
56	29
57	27
58	29
59	31
60	29
61	31
62	33

[1, 3, 1, 3, 5, 3, 5, 7, 5, 7, 5, 7, 9, 7, 9, 7, 9, 11, 9, 11, 13, 11, 13, 11, 13, 15, 13, 15, 17, 15, 17, 15, 17, 19, 17, 19, 17, 19, 21, 19, 21, 23, 21, 23, 21, 23, 25, 23, 25, 23, 25, 27, 25, 27, 29, 27, 29, 27, 29, 31, 29, 31, 33]

cp's OEIS Frontend

A012264 Number of real roots of x - x^3/3! + x^5/5! - ... + (-1)^n*x^(2n+1)/(2n+1)!.

Table of values

List of values

n	a(n)
0	1
1	3
2	1
3	3
4	5
5	3
6	5
7	7
8	5
9	7
10	5
11	7
12	9
13	7
14	9
15	7
16	9
17	11
18	9
19	11
20	13
21	11
22	13
23	11
24	13
25	15
26	13
27	15
28	17
29	15
30	17
31	15
32	17
33	19
34	17
35	19
36	17
37	19
38	21
39	19
40	21
41	23
42	21
43	23
44	21
45	23
46	25
47	23
48	25
49	23
50	25
51	27
52	25
53	27
54	29
55	27
56	29
57	27
58	29
59	31
60	29
61	31
62	33

n	a(n)
0	1
1	3
2	1
3	3
4	5
5	3
6	5
7	7
8	5
9	7
10	5
11	7
12	9
13	7
14	9
15	7
16	9
17	11
18	9
19	11
20	13
21	11
22	13
23	11
24	13
25	15
26	13
27	15
28	17
29	15
30	17
31	15
32	17
33	19
34	17
35	19
36	17
37	19
38	21
39	19
40	21
41	23
42	21
43	23
44	21
45	23
46	25
47	23
48	25
49	23
50	25
51	27
52	25
53	27
54	29
55	27
56	29
57	27
58	29
59	31
60	29
61	31
62	33

n	a(n)
0	1
1	3
2	1
3	3
4	5
5	3
6	5
7	7
8	5
9	7
10	5
11	7
12	9
13	7
14	9
15	7
16	9
17	11
18	9
19	11
20	13
21	11
22	13
23	11
24	13
25	15
26	13
27	15
28	17
29	15
30	17
31	15
32	17
33	19
34	17
35	19
36	17
37	19
38	21
39	19
40	21
41	23
42	21
43	23
44	21
45	23
46	25
47	23
48	25
49	23
50	25
51	27
52	25
53	27
54	29
55	27
56	29
57	27
58	29
59	31
60	29
61	31
62	33