A062128 - cp's OEIS frontend

A062128 In base 2: start with n; if palindrome, stop; otherwise add to itself with digits reversed; a(n) gives palindrome at which it stops, or -1 if no palindrome is ever reached.

n	a(n)
0	0
1	1
2	11
3	11
4	101
5	101
6	1001
7	111
8	1001
9	1001
10	1111
11	11011
12	1111
13	11011
14	10101
15	1111
16	10001
17	10001
18	11011
19	1100011
20	1100011
21	10101
22	-1
23	111111
24	11011
25	1100011
26	-1
27	11011
28	-1
29	111111
30	101101
31	11111
32	100001
33	100001
34	110011
35	-1
36	101101
37	-1
38	111111
39	1100011
40	101101
41	-1
42	111111
43	1100011
44	1100011

[0, 1, 11, 11, 101, 101, 1001, 111, 1001, 1001, 1111, 11011, 1111, 11011, 10101, 1111, 10001, 10001, 11011, 1100011, 1100011, 10101, -1, 111111, 11011, 1100011, -1, 11011, -1, 111111, 101101, 11111, 100001, 100001, 110011, -1, 101101, -1, 111111, 1100011, 101101, -1, 111111, 1100011, 1100011]

cp's OEIS Frontend

A062128 In base 2: start with n; if palindrome, stop; otherwise add to itself with digits reversed; a(n) gives palindrome at which it stops, or -1 if no palindrome is ever reached.

Table of values

List of values