A176352 - cp's OEIS frontend

A176352 Order the positive rationals by numerator+denominator, then by numerator. a(n+1) = a(n)*r, where r is the first unused positive rational that makes a(n+1) an integer not already in the sequence.

n	a(n)
1	1
2	2
3	6
4	3
5	12
6	4
7	20
8	5
9	30
10	45
11	9
12	15
13	10
14	25
15	175
16	70
17	42
18	7
19	56
20	8
21	28
22	21
23	49
24	14
25	126
26	168
27	210
28	90
29	72
30	16
31	160
32	60
33	50
34	225
35	270
36	27
37	297
38	33
39	88
40	11
41	132
42	231
43	165
44	264
45	24
46	54
47	63
48	36
49	120
50	75
51	105
52	189
53	84
54	462
55	396
56	108
57	1404
58	117
59	65
60	910
61	273
62	1001
63	182
64	13

[1, 2, 6, 3, 12, 4, 20, 5, 30, 45, 9, 15, 10, 25, 175, 70, 42, 7, 56, 8, 28, 21, 49, 14, 126, 168, 210, 90, 72, 16, 160, 60, 50, 225, 270, 27, 297, 33, 88, 11, 132, 231, 165, 264, 24, 54, 63, 36, 120, 75, 105, 189, 84, 462, 396, 108, 1404, 117, 65, 910, 273, 1001, 182, 13]

cp's OEIS Frontend

A176352 Order the positive rationals by numerator+denominator, then by numerator. a(n+1) = a(n)*r, where r is the first unused positive rational that makes a(n+1) an integer not already in the sequence.

Table of values

List of values