A085307 - cp's OEIS frontend

A085307 a(1) = 1; for n > 1, concatenate distinct prime factors of n in decreasing order.

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	32
7	7
8	2
9	3
10	52
11	11
12	32
13	13
14	72
15	53
16	2
17	17
18	32
19	19
20	52
21	73
22	112
23	23
24	32
25	5
26	132
27	3
28	72
29	29
30	532
31	31
32	2
33	113
34	172
35	75
36	32
37	37
38	192
39	133
40	52
41	41
42	732
43	43
44	112
45	53
46	232
47	47
48	32
49	7
50	52
51	173
52	132
53	53
54	32
55	115
56	72
57	193
58	292
59	59
60	532
61	61
62	312
63	73
64	2
65	135
66	1132
67	67

[1, 2, 3, 2, 5, 32, 7, 2, 3, 52, 11, 32, 13, 72, 53, 2, 17, 32, 19, 52, 73, 112, 23, 32, 5, 132, 3, 72, 29, 532, 31, 2, 113, 172, 75, 32, 37, 192, 133, 52, 41, 732, 43, 112, 53, 232, 47, 32, 7, 52, 173, 132, 53, 32, 115, 72, 193, 292, 59, 532, 61, 312, 73, 2, 135, 1132, 67]

cp's OEIS Frontend

A085307 a(1) = 1; for n > 1, concatenate distinct prime factors of n in decreasing order.

Table of values

List of values