A033665 - cp's OEIS frontend

A033665 Number of 'Reverse and Add' steps needed to reach a palindrome starting at n, or -1 if n never reaches a palindrome.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	1
11	0
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	2
20	1
21	1
22	0
23	1
24	1
25	1
26	1
27	1
28	2
29	1
30	1
31	1
32	1
33	0
34	1
35	1
36	1
37	2
38	1
39	2
40	1
41	1
42	1
43	1
44	0
45	1
46	2
47	1
48	2
49	2
50	1
51	1
52	1
53	1
54	1
55	0
56	1
57	2
58	2
59	3
60	1
61	1
62	1
63	1
64	2
65	1
66	0
67	2
68	3
69	4
70	1
71	1
72	1
73	2
74	1
75	2
76	2
77	0
78	4
79	6
80	1
81	1
82	2
83	1
84	2
85	2
86	3
87	4
88	0
89	24
90	1
91	2
92	1
93	2
94	2
95	3
96	4
97	6
98	24
99	0
100	1
101	0
102	1
103	1

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 0, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 0, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 0, 1, 2, 1, 2, 2, 1, 1, 1, 1, 1, 0, 1, 2, 2, 3, 1, 1, 1, 1, 2, 1, 0, 2, 3, 4, 1, 1, 1, 2, 1, 2, 2, 0, 4, 6, 1, 1, 2, 1, 2, 2, 3, 4, 0, 24, 1, 2, 1, 2, 2, 3, 4, 6, 24, 0, 1, 0, 1, 1]

cp's OEIS Frontend

A033665 Number of 'Reverse and Add' steps needed to reach a palindrome starting at n, or -1 if n never reaches a palindrome.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	1
11	0
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	2
20	1
21	1
22	0
23	1
24	1
25	1
26	1
27	1
28	2
29	1
30	1
31	1
32	1
33	0
34	1
35	1
36	1
37	2
38	1
39	2
40	1
41	1
42	1
43	1
44	0
45	1
46	2
47	1
48	2
49	2
50	1
51	1
52	1
53	1
54	1
55	0
56	1
57	2
58	2
59	3
60	1
61	1
62	1
63	1
64	2
65	1
66	0
67	2
68	3
69	4
70	1
71	1
72	1
73	2
74	1
75	2
76	2
77	0
78	4
79	6
80	1
81	1
82	2
83	1
84	2
85	2
86	3
87	4
88	0
89	24
90	1
91	2
92	1
93	2
94	2
95	3
96	4
97	6
98	24
99	0
100	1
101	0
102	1
103	1

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	1
11	0
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	2
20	1
21	1
22	0
23	1
24	1
25	1
26	1
27	1
28	2
29	1
30	1
31	1
32	1
33	0
34	1
35	1
36	1
37	2
38	1
39	2
40	1
41	1
42	1
43	1
44	0
45	1
46	2
47	1
48	2
49	2
50	1
51	1
52	1
53	1
54	1
55	0
56	1
57	2
58	2
59	3
60	1
61	1
62	1
63	1
64	2
65	1
66	0
67	2
68	3
69	4
70	1
71	1
72	1
73	2
74	1
75	2
76	2
77	0
78	4
79	6
80	1
81	1
82	2
83	1
84	2
85	2
86	3
87	4
88	0
89	24
90	1
91	2
92	1
93	2
94	2
95	3
96	4
97	6
98	24
99	0
100	1
101	0
102	1
103	1

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	1
11	0
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	2
20	1
21	1
22	0
23	1
24	1
25	1
26	1
27	1
28	2
29	1
30	1
31	1
32	1
33	0
34	1
35	1
36	1
37	2
38	1
39	2
40	1
41	1
42	1
43	1
44	0
45	1
46	2
47	1
48	2
49	2
50	1
51	1
52	1
53	1
54	1
55	0
56	1
57	2
58	2
59	3
60	1
61	1
62	1
63	1
64	2
65	1
66	0
67	2
68	3
69	4
70	1
71	1
72	1
73	2
74	1
75	2
76	2
77	0
78	4
79	6
80	1
81	1
82	2
83	1
84	2
85	2
86	3
87	4
88	0
89	24
90	1
91	2
92	1
93	2
94	2
95	3
96	4
97	6
98	24
99	0
100	1
101	0
102	1
103	1