A126287 - cp's OEIS frontend

A126287 a(1) = 1, a(2) = 1, a(n) = n * LeastPrimeFactor(n-1) / LeastPrimeFactor(n).

n	a(n)
1	1
2	1
3	2
4	6
5	2
6	15
7	2
8	28
9	6
10	15
11	2
12	66
13	2
14	91
15	10
16	24
17	2
18	153
19	2
20	190
21	14
22	33
23	2
24	276
25	10
26	65
27	18
28	42
29	2
30	435
31	2
32	496
33	22
34	51
35	14
36	90
37	2
38	703
39	26
40	60
41	2
42	861
43	2
44	946
45	30
46	69
47	2
48	1128
49	14
50	175
51	34
52	78
53	2
54	1431
55	22
56	140
57	38
58	87
59	2
60	1770
61	2
62	1891
63	42
64	96
65	26
66	165
67	2
68	2278
69	46
70	105

[1, 1, 2, 6, 2, 15, 2, 28, 6, 15, 2, 66, 2, 91, 10, 24, 2, 153, 2, 190, 14, 33, 2, 276, 10, 65, 18, 42, 2, 435, 2, 496, 22, 51, 14, 90, 2, 703, 26, 60, 2, 861, 2, 946, 30, 69, 2, 1128, 14, 175, 34, 78, 2, 1431, 22, 140, 38, 87, 2, 1770, 2, 1891, 42, 96, 26, 165, 2, 2278, 46, 105]

cp's OEIS Frontend

A126287 a(1) = 1, a(2) = 1, a(n) = n * LeastPrimeFactor(n-1) / LeastPrimeFactor(n).

Table of values

List of values