A075159 - cp's OEIS frontend

A075159 Run lengths in the binary expansion of n-1 gives the vector of exponents in prime factorization of a(n), with the least significant run corresponding to the exponent of the least prime, 2.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	5
7	9
8	8
9	12
10	15
11	7
12	10
13	18
14	25
15	27
16	16
17	24
18	45
19	35
20	30
21	14
22	11
23	21
24	20
25	36
26	75
27	49
28	50
29	54
30	125
31	81
32	32
33	48
34	135
35	175
36	90
37	70
38	77
39	105
40	60
41	28
42	33
43	13
44	22
45	42
46	55
47	63
48	40
49	72
50	225
51	245
52	150
53	98
54	121
55	147
56	100
57	108
58	375
59	343
60	250
61	162
62	625
63	243
64	64
65	96
66	405

[1, 2, 3, 4, 6, 5, 9, 8, 12, 15, 7, 10, 18, 25, 27, 16, 24, 45, 35, 30, 14, 11, 21, 20, 36, 75, 49, 50, 54, 125, 81, 32, 48, 135, 175, 90, 70, 77, 105, 60, 28, 33, 13, 22, 42, 55, 63, 40, 72, 225, 245, 150, 98, 121, 147, 100, 108, 375, 343, 250, 162, 625, 243, 64, 96, 405]

cp's OEIS Frontend

A075159 Run lengths in the binary expansion of n-1 gives the vector of exponents in prime factorization of a(n), with the least significant run corresponding to the exponent of the least prime, 2.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	5
7	9
8	8
9	12
10	15
11	7
12	10
13	18
14	25
15	27
16	16
17	24
18	45
19	35
20	30
21	14
22	11
23	21
24	20
25	36
26	75
27	49
28	50
29	54
30	125
31	81
32	32
33	48
34	135
35	175
36	90
37	70
38	77
39	105
40	60
41	28
42	33
43	13
44	22
45	42
46	55
47	63
48	40
49	72
50	225
51	245
52	150
53	98
54	121
55	147
56	100
57	108
58	375
59	343
60	250
61	162
62	625
63	243
64	64
65	96
66	405

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	5
7	9
8	8
9	12
10	15
11	7
12	10
13	18
14	25
15	27
16	16
17	24
18	45
19	35
20	30
21	14
22	11
23	21
24	20
25	36
26	75
27	49
28	50
29	54
30	125
31	81
32	32
33	48
34	135
35	175
36	90
37	70
38	77
39	105
40	60
41	28
42	33
43	13
44	22
45	42
46	55
47	63
48	40
49	72
50	225
51	245
52	150
53	98
54	121
55	147
56	100
57	108
58	375
59	343
60	250
61	162
62	625
63	243
64	64
65	96
66	405

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	5
7	9
8	8
9	12
10	15
11	7
12	10
13	18
14	25
15	27
16	16
17	24
18	45
19	35
20	30
21	14
22	11
23	21
24	20
25	36
26	75
27	49
28	50
29	54
30	125
31	81
32	32
33	48
34	135
35	175
36	90
37	70
38	77
39	105
40	60
41	28
42	33
43	13
44	22
45	42
46	55
47	63
48	40
49	72
50	225
51	245
52	150
53	98
54	121
55	147
56	100
57	108
58	375
59	343
60	250
61	162
62	625
63	243
64	64
65	96
66	405