A363444 - cp's OEIS frontend

A363444 a(n) = n for n <= 3; for n > 3, a(n) is the smallest positive number that has not yet appeared that includes as factors the distinct prime factors of a(n-2) and a(n-1) that are not shared between a(n-2) and a(n-1).

n	a(n)
1	1
2	2
3	3
4	6
5	4
6	9
7	12
8	8
9	15
10	30
11	10
12	18
13	45
14	20
15	24
16	60
17	5
18	36
19	90
20	25
21	42
22	210
23	35
24	48
25	420
26	70
27	21
28	120
29	140
30	63
31	150
32	280
33	84
34	75
35	350
36	126
37	105
38	40
39	168
40	315
41	50
42	252
43	525
44	80
45	294
46	630
47	55
48	462
49	840
50	110
51	231
52	1050
53	220
54	693
55	1260
56	330
57	77
58	1470
59	660
60	154
61	735
62	990
63	308
64	945
65	1320
66	616
67	1155

[1, 2, 3, 6, 4, 9, 12, 8, 15, 30, 10, 18, 45, 20, 24, 60, 5, 36, 90, 25, 42, 210, 35, 48, 420, 70, 21, 120, 140, 63, 150, 280, 84, 75, 350, 126, 105, 40, 168, 315, 50, 252, 525, 80, 294, 630, 55, 462, 840, 110, 231, 1050, 220, 693, 1260, 330, 77, 1470, 660, 154, 735, 990, 308, 945, 1320, 616, 1155]

cp's OEIS Frontend

A363444 a(n) = n for n <= 3; for n > 3, a(n) is the smallest positive number that has not yet appeared that includes as factors the distinct prime factors of a(n-2) and a(n-1) that are not shared between a(n-2) and a(n-1).

Table of values

List of values