A066720 - cp's OEIS frontend

A066720 The greedy rational packing sequence: a(1) = 1; for n > 1, a(n) is smallest number such that the ratios a(i)/a(j) for 1 <= i < j <= n are all distinct.

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	8
7	11
8	13
9	17
10	18
11	19
12	23
13	29
14	31
15	37
16	41
17	43
18	47
19	50
20	53
21	59
22	60
23	61
24	67
25	71
26	73
27	79
28	81
29	83
30	89
31	97
32	98
33	101
34	103
35	105
36	107
37	109
38	113
39	127
40	128
41	131
42	137
43	139
44	149
45	151
46	157
47	163
48	167
49	173
50	179
51	181
52	191
53	193
54	197
55	199
56	211
57	223
58	227
59	229
60	233
61	239

[1, 2, 3, 5, 7, 8, 11, 13, 17, 18, 19, 23, 29, 31, 37, 41, 43, 47, 50, 53, 59, 60, 61, 67, 71, 73, 79, 81, 83, 89, 97, 98, 101, 103, 105, 107, 109, 113, 127, 128, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239]

cp's OEIS Frontend

A066720 The greedy rational packing sequence: a(1) = 1; for n > 1, a(n) is smallest number such that the ratios a(i)/a(j) for 1 <= i < j <= n are all distinct.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	8
7	11
8	13
9	17
10	18
11	19
12	23
13	29
14	31
15	37
16	41
17	43
18	47
19	50
20	53
21	59
22	60
23	61
24	67
25	71
26	73
27	79
28	81
29	83
30	89
31	97
32	98
33	101
34	103
35	105
36	107
37	109
38	113
39	127
40	128
41	131
42	137
43	139
44	149
45	151
46	157
47	163
48	167
49	173
50	179
51	181
52	191
53	193
54	197
55	199
56	211
57	223
58	227
59	229
60	233
61	239

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	8
7	11
8	13
9	17
10	18
11	19
12	23
13	29
14	31
15	37
16	41
17	43
18	47
19	50
20	53
21	59
22	60
23	61
24	67
25	71
26	73
27	79
28	81
29	83
30	89
31	97
32	98
33	101
34	103
35	105
36	107
37	109
38	113
39	127
40	128
41	131
42	137
43	139
44	149
45	151
46	157
47	163
48	167
49	173
50	179
51	181
52	191
53	193
54	197
55	199
56	211
57	223
58	227
59	229
60	233
61	239

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	8
7	11
8	13
9	17
10	18
11	19
12	23
13	29
14	31
15	37
16	41
17	43
18	47
19	50
20	53
21	59
22	60
23	61
24	67
25	71
26	73
27	79
28	81
29	83
30	89
31	97
32	98
33	101
34	103
35	105
36	107
37	109
38	113
39	127
40	128
41	131
42	137
43	139
44	149
45	151
46	157
47	163
48	167
49	173
50	179
51	181
52	191
53	193
54	197
55	199
56	211
57	223
58	227
59	229
60	233
61	239