A257480 - cp's OEIS frontend

A257480 S(n) = (3 + (3/2)^v(1 + F(4n - 3))(1 + F(4n - 3)))/6, n >= 1, where F(x) = (3x + 1)/2^v(3*x + 1) for x odd, and v(y) denotes the 2-adic valuation of y.

n	a(n)
1	1
2	1
3	5
4	2
5	4
6	1
7	8
8	5
9	7
10	5
11	41
12	5
13	10
14	2
15	17
16	14
17	13
18	4
19	32
20	8
21	16
22	1
23	26
24	14
25	19
26	8
27	68
28	11
29	22
30	5
31	35
32	41
33	25
34	7
35	59
36	14
37	28
38	5
39	44
40	23
41	31
42	41
43	365
44	17
45	34
46	5
47	53
48	41
49	37
50	10
51	86
52	20
53	40
54	2
55	62
56	32
57	43
58	17
59	149

[1, 1, 5, 2, 4, 1, 8, 5, 7, 5, 41, 5, 10, 2, 17, 14, 13, 4, 32, 8, 16, 1, 26, 14, 19, 8, 68, 11, 22, 5, 35, 41, 25, 7, 59, 14, 28, 5, 44, 23, 31, 41, 365, 17, 34, 5, 53, 41, 37, 10, 86, 20, 40, 2, 62, 32, 43, 17, 149]

cp's OEIS Frontend

A257480 S(n) = (3 + (3/2)^v(1 + F(4n - 3))(1 + F(4n - 3)))/6, n >= 1, where F(x) = (3x + 1)/2^v(3*x + 1) for x odd, and v(y) denotes the 2-adic valuation of y.

Table of values

List of values

n	a(n)
1	1
2	1
3	5
4	2
5	4
6	1
7	8
8	5
9	7
10	5
11	41
12	5
13	10
14	2
15	17
16	14
17	13
18	4
19	32
20	8
21	16
22	1
23	26
24	14
25	19
26	8
27	68
28	11
29	22
30	5
31	35
32	41
33	25
34	7
35	59
36	14
37	28
38	5
39	44
40	23
41	31
42	41
43	365
44	17
45	34
46	5
47	53
48	41
49	37
50	10
51	86
52	20
53	40
54	2
55	62
56	32
57	43
58	17
59	149

n	a(n)
1	1
2	1
3	5
4	2
5	4
6	1
7	8
8	5
9	7
10	5
11	41
12	5
13	10
14	2
15	17
16	14
17	13
18	4
19	32
20	8
21	16
22	1
23	26
24	14
25	19
26	8
27	68
28	11
29	22
30	5
31	35
32	41
33	25
34	7
35	59
36	14
37	28
38	5
39	44
40	23
41	31
42	41
43	365
44	17
45	34
46	5
47	53
48	41
49	37
50	10
51	86
52	20
53	40
54	2
55	62
56	32
57	43
58	17
59	149

cp's OEIS Frontend

A257480 S(n) = (3 + (3/2)^v(1 + F(4*n - 3))*(1 + F(4*n - 3)))/6, n >= 1, where F(x) = (3*x + 1)/2^v(3*x + 1) for x odd, and v(y) denotes the 2-adic valuation of y.

Table of values

List of values

A257480 S(n) = (3 + (3/2)^v(1 + F(4n - 3))(1 + F(4n - 3)))/6, n >= 1, where F(x) = (3x + 1)/2^v(3*x + 1) for x odd, and v(y) denotes the 2-adic valuation of y.

n	a(n)
1	1
2	1
3	5
4	2
5	4
6	1
7	8
8	5
9	7
10	5
11	41
12	5
13	10
14	2
15	17
16	14
17	13
18	4
19	32
20	8
21	16
22	1
23	26
24	14
25	19
26	8
27	68
28	11
29	22
30	5
31	35
32	41
33	25
34	7
35	59
36	14
37	28
38	5
39	44
40	23
41	31
42	41
43	365
44	17
45	34
46	5
47	53
48	41
49	37
50	10
51	86
52	20
53	40
54	2
55	62
56	32
57	43
58	17
59	149