A048986 - cp's OEIS frontend

A048986 Home primes in base 2: primes reached when you start with n and (working in base 2) concatenate its prime factors (A048985); repeat until a prime is reached (or -1 if no prime is ever reached). Answer is written in base 10.

n	a(n)
1	1
2	2
3	3
4	31
5	5
6	11
7	7
8	179
9	29
10	31
11	11
12	43
13	13
14	23
15	29
16	12007
17	17
18	47
19	19
20	251
21	31
22	43
23	23
24	499
25	4091
26	4091
27	127
28	4091
29	29
30	127
31	31
32	1564237
33	59
34	4079
35	47
36	367
37	37
38	83
39	61
40	383
41	41
42	179
43	43
44	499
45	4091
46	4091
47	47
48	683
49	127
50	173
51	113
52	173
53	53
54	191
55	4091

[1, 2, 3, 31, 5, 11, 7, 179, 29, 31, 11, 43, 13, 23, 29, 12007, 17, 47, 19, 251, 31, 43, 23, 499, 4091, 4091, 127, 4091, 29, 127, 31, 1564237, 59, 4079, 47, 367, 37, 83, 61, 383, 41, 179, 43, 499, 4091, 4091, 47, 683, 127, 173, 113, 173, 53, 191, 4091]

cp's OEIS Frontend

A048986 Home primes in base 2: primes reached when you start with n and (working in base 2) concatenate its prime factors (A048985); repeat until a prime is reached (or -1 if no prime is ever reached). Answer is written in base 10.

Table of values

List of values