A285639 - cp's OEIS frontend

A285639 a(n) = n*A117366(n)/spf(n), where A117366(n) is the smallest prime larger than all prime factors of n, and spf is the smallest prime factor of n (or 1 if n = 1).

n	a(n)
1	2
2	3
3	5
4	6
5	7
6	15
7	11
8	12
9	15
10	35
11	13
12	30
13	17
14	77
15	35
16	24
17	19
18	45
19	23
20	70
21	77
22	143
23	29
24	60
25	35
26	221
27	45
28	154
29	31
30	105
31	37
32	48
33	143
34	323
35	77
36	90
37	41
38	437
39	221
40	140
41	43
42	231
43	47
44	286
45	105
46	667
47	53
48	120
49	77
50	175
51	323
52	442
53	59
54	135
55	143
56	308
57	437
58	899
59	61
60	210
61	67
62	1147

[2, 3, 5, 6, 7, 15, 11, 12, 15, 35, 13, 30, 17, 77, 35, 24, 19, 45, 23, 70, 77, 143, 29, 60, 35, 221, 45, 154, 31, 105, 37, 48, 143, 323, 77, 90, 41, 437, 221, 140, 43, 231, 47, 286, 105, 667, 53, 120, 77, 175, 323, 442, 59, 135, 143, 308, 437, 899, 61, 210, 67, 1147]

cp's OEIS Frontend

A285639 a(n) = n*A117366(n)/spf(n), where A117366(n) is the smallest prime larger than all prime factors of n, and spf is the smallest prime factor of n (or 1 if n = 1).

Table of values

List of values