A371448 - cp's OEIS frontend

A371448 Numbers such that (1) the product of prime indices is squarefree, and (2) the binary indices of prime indices cover an initial interval of positive integers.

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	10
8	12
9	15
10	16
11	17
12	20
13	24
14	26
15	30
16	32
17	33
18	34
19	40
20	47
21	48
22	51
23	52
24	55
25	60
26	64
27	66
28	68
29	80
30	85
31	86
32	94
33	96
34	102
35	104
36	110
37	120
38	123
39	127
40	128
41	132
42	136
43	141
44	143
45	160
46	165
47	170
48	172
49	187
50	188
51	192
52	204
53	205
54	208
55	215
56	220
57	221
58	226
59	240
60	246

[1, 2, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 26, 30, 32, 33, 34, 40, 47, 48, 51, 52, 55, 60, 64, 66, 68, 80, 85, 86, 94, 96, 102, 104, 110, 120, 123, 127, 128, 132, 136, 141, 143, 160, 165, 170, 172, 187, 188, 192, 204, 205, 208, 215, 220, 221, 226, 240, 246]

cp's OEIS Frontend

A371448 Numbers such that (1) the product of prime indices is squarefree, and (2) the binary indices of prime indices cover an initial interval of positive integers.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	10
8	12
9	15
10	16
11	17
12	20
13	24
14	26
15	30
16	32
17	33
18	34
19	40
20	47
21	48
22	51
23	52
24	55
25	60
26	64
27	66
28	68
29	80
30	85
31	86
32	94
33	96
34	102
35	104
36	110
37	120
38	123
39	127
40	128
41	132
42	136
43	141
44	143
45	160
46	165
47	170
48	172
49	187
50	188
51	192
52	204
53	205
54	208
55	215
56	220
57	221
58	226
59	240
60	246

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	10
8	12
9	15
10	16
11	17
12	20
13	24
14	26
15	30
16	32
17	33
18	34
19	40
20	47
21	48
22	51
23	52
24	55
25	60
26	64
27	66
28	68
29	80
30	85
31	86
32	94
33	96
34	102
35	104
36	110
37	120
38	123
39	127
40	128
41	132
42	136
43	141
44	143
45	160
46	165
47	170
48	172
49	187
50	188
51	192
52	204
53	205
54	208
55	215
56	220
57	221
58	226
59	240
60	246

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	10
8	12
9	15
10	16
11	17
12	20
13	24
14	26
15	30
16	32
17	33
18	34
19	40
20	47
21	48
22	51
23	52
24	55
25	60
26	64
27	66
28	68
29	80
30	85
31	86
32	94
33	96
34	102
35	104
36	110
37	120
38	123
39	127
40	128
41	132
42	136
43	141
44	143
45	160
46	165
47	170
48	172
49	187
50	188
51	192
52	204
53	205
54	208
55	215
56	220
57	221
58	226
59	240
60	246