A097089 - cp's OEIS frontend

A097089 Exponents of 2 that form the denominators of coefficients in function A(x) such that A(A(x)) = x+x^2.

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

[0, 0, 1, 2, 2, 4, 6, 4, 8, 7, 11, 12, 13, 13, 14, 15, 18, 18, 20, 22, 23, 24, 26, 26, 25, 26, 30, 31, 33, 32, 34, 33, 38, 38, 39, 39, 42, 44, 46, 46, 46, 48, 51, 52, 53, 53, 55, 55, 56, 55, 59, 61, 62, 63, 65, 66, 68, 68, 70, 71, 73]

cp's OEIS Frontend

A097089 Exponents of 2 that form the denominators of coefficients in function A(x) such that A(A(x)) = x+x^2.

Table of values

List of values

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

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

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