A225538 - cp's OEIS frontend

A225538 Let r(n) denote the reverse of n. For every n, consider the sequence n_1 = n + 1 + r(n+1), and for m >= 2, n_m = n_(m-1) + 1 + r(n_(m-1) + 1). a(n) is the least m for which n_m is a palindrome, or 0 if there is no such m.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	2
8	3
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	2
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	2
28	1
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	2
37	1
38	2
39	1
40	1
41	1
42	1
43	1
44	1
45	2
46	1
47	2
48	2
49	1
50	1
51	1
52	1
53	1
54	2
55	1
56	2
57	2
58	4
59	1
60	1
61	1
62	1
63	2
64	1
65	2
66	2
67	4
68	7
69	1
70	1
71	1
72	2
73	1
74	2
75	2
76	4
77	7
78	10
79	1
80	1
81	2
82	1
83	2
84	2
85	4
86	7

[1, 1, 1, 1, 2, 2, 2, 2, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 1, 1, 1, 1, 2, 1, 2, 2, 4, 1, 1, 1, 1, 2, 1, 2, 2, 4, 7, 1, 1, 1, 2, 1, 2, 2, 4, 7, 10, 1, 1, 2, 1, 2, 2, 4, 7]

cp's OEIS Frontend

A225538 Let r(n) denote the reverse of n. For every n, consider the sequence n_1 = n + 1 + r(n+1), and for m >= 2, n_m = n_(m-1) + 1 + r(n_(m-1) + 1). a(n) is the least m for which n_m is a palindrome, or 0 if there is no such m.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	2
8	3
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	2
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	2
28	1
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	2
37	1
38	2
39	1
40	1
41	1
42	1
43	1
44	1
45	2
46	1
47	2
48	2
49	1
50	1
51	1
52	1
53	1
54	2
55	1
56	2
57	2
58	4
59	1
60	1
61	1
62	1
63	2
64	1
65	2
66	2
67	4
68	7
69	1
70	1
71	1
72	2
73	1
74	2
75	2
76	4
77	7
78	10
79	1
80	1
81	2
82	1
83	2
84	2
85	4
86	7

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	2
8	3
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	2
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	2
28	1
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	2
37	1
38	2
39	1
40	1
41	1
42	1
43	1
44	1
45	2
46	1
47	2
48	2
49	1
50	1
51	1
52	1
53	1
54	2
55	1
56	2
57	2
58	4
59	1
60	1
61	1
62	1
63	2
64	1
65	2
66	2
67	4
68	7
69	1
70	1
71	1
72	2
73	1
74	2
75	2
76	4
77	7
78	10
79	1
80	1
81	2
82	1
83	2
84	2
85	4
86	7

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	2
8	3
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	2
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	2
28	1
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	2
37	1
38	2
39	1
40	1
41	1
42	1
43	1
44	1
45	2
46	1
47	2
48	2
49	1
50	1
51	1
52	1
53	1
54	2
55	1
56	2
57	2
58	4
59	1
60	1
61	1
62	1
63	2
64	1
65	2
66	2
67	4
68	7
69	1
70	1
71	1
72	2
73	1
74	2
75	2
76	4
77	7
78	10
79	1
80	1
81	2
82	1
83	2
84	2
85	4
86	7