A298882 - cp's OEIS frontend

A298882 a(1) = 1, and for any n > 1, if n is the k-th number with least prime factor p, then a(n) is the k-th number with greatest prime factor p.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	8
7	7
8	16
9	6
10	32
11	11
12	64
13	13
14	128
15	9
16	256
17	17
18	512
19	19
20	1024
21	12
22	2048
23	23
24	4096
25	10
26	8192
27	18
28	16384
29	29
30	32768
31	31
32	65536
33	24
34	131072
35	15
36	262144
37	37
38	524288
39	27
40	1048576
41	41
42	2097152
43	43
44	4194304
45	36
46	8388608
47	47
48	16777216
49	14
50	33554432
51	48

[1, 2, 3, 4, 5, 8, 7, 16, 6, 32, 11, 64, 13, 128, 9, 256, 17, 512, 19, 1024, 12, 2048, 23, 4096, 10, 8192, 18, 16384, 29, 32768, 31, 65536, 24, 131072, 15, 262144, 37, 524288, 27, 1048576, 41, 2097152, 43, 4194304, 36, 8388608, 47, 16777216, 14, 33554432, 48]

cp's OEIS Frontend

A298882 a(1) = 1, and for any n > 1, if n is the k-th number with least prime factor p, then a(n) is the k-th number with greatest prime factor p.

Table of values

List of values