A033865 - cp's OEIS frontend

A033865 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	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	11
12	33
13	44
14	55
15	66
16	77
17	88
18	99
19	121
20	22
21	33
22	22
23	55
24	66
25	77
26	88
27	99
28	121
29	121
30	33
31	44
32	55
33	33
34	77
35	88
36	99
37	121
38	121
39	363
40	44
41	55
42	66
43	77
44	44
45	99
46	121
47	121
48	363
49	484
50	55
51	66
52	77
53	88
54	99
55	55
56	121
57	363
58	484
59	1111
60	66
61	77
62	88
63	99
64	121
65	121
66	66
67	484
68	1111
69	4884
70	77
71	88
72	99
73	121
74	121
75	363
76	484
77	77
78	4884
79	44044
80	88

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 11, 33, 44, 55, 66, 77, 88, 99, 121, 22, 33, 22, 55, 66, 77, 88, 99, 121, 121, 33, 44, 55, 33, 77, 88, 99, 121, 121, 363, 44, 55, 66, 77, 44, 99, 121, 121, 363, 484, 55, 66, 77, 88, 99, 55, 121, 363, 484, 1111, 66, 77, 88, 99, 121, 121, 66, 484, 1111, 4884, 77, 88, 99, 121, 121, 363, 484, 77, 4884, 44044, 88]

cp's OEIS Frontend

A033865 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